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Response
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Security

Token

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Firewall

main Name
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Stateless

Configuration

Key Value
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context main
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Access Decision

affirmative Strategy
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"App\Security\Voter\NotificationVoter"
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"App\Security\Voter\PostVoter"
 ACCESS ABSTAIN 
"App\Security\Voter\UserVoter"
 ACCESS ABSTAIN
Show voter details
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  +title: "What's a simplest way to get -5v from +/-12v?"
  +url: null
  +body: """
    Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
    \n
    TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
    """
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN
Show voter details
3 DENIED edit 
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  +url: null
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    Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
    \n
    TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
    """
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 ACCESS ABSTAIN 
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 ACCESS ABSTAIN
Show voter details
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      -----\n
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    Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
    \n
    TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
    """
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
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      \n
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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        +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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      +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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  +body: """
    it worked! (at least in the sim)  \n
     thanks a lot!  \n
     I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
     I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
    """
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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        +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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    it worked! (at least in the sim)  \n
     thanks a lot!  \n
     I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
     I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
    """
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        **For questions about component-level electronic circuits, tools and equipment.**\n
        \n
        Rules\n
        -----\n
        \n
        1: Be nice.\n
        \n
        2: Be on-topic (eg: *Electronic*, not *electrical*).\n
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    +slug: "What-s-a-simplest-way-to-get-5v-from-12v"
    +title: "What's a simplest way to get -5v from +/-12v?"
    +url: null
    +body: """
      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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        +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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    +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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  +root: App\Entity\EntryComment {#4016}
  +body: """
    it worked! (at least in the sim)  \n
     thanks a lot!  \n
     I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
     I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
    """
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22 DENIED moderate 
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      +name: "askelectronics@discuss.tchncs.de"
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        **For questions about component-level electronic circuits, tools and equipment.**\n
        \n
        Rules\n
        -----\n
        \n
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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    -titleTs: "'-12':11 '-5':8 'get':7 'simplest':4 'v':9,12 'way':5"
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          +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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        +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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      +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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    +body: """
      it worked! (at least in the sim)  \n
       thanks a lot!  \n
       I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
       I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
      """
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  +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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          +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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      it worked! (at least in the sim)  \n
       thanks a lot!  \n
       I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
       I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
      """
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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          +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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      it worked! (at least in the sim)  \n
       thanks a lot!  \n
       I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
       I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
      """
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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    -titleTs: "'-12':11 '-5':8 'get':7 'simplest':4 'v':9,12 'way':5"
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            +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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          +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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        +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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      +body: """
        it worked! (at least in the sim)  \n
         thanks a lot!  \n
         I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
         I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
        """
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    +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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  +body: """
    So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
    \n
    Is that correct?
    """
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    +body: """
      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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            +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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          +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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        +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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        it worked! (at least in the sim)  \n
         thanks a lot!  \n
         I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
         I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
        """
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    +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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    So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
    \n
    Is that correct?
    """
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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            +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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        it worked! (at least in the sim)  \n
         thanks a lot!  \n
         I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
         I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
        """
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    +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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    So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
    \n
    Is that correct?
    """
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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              +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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            +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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        +body: """
          it worked! (at least in the sim)  \n
           thanks a lot!  \n
           I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
           I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
          """
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      +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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    +body: """
      So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
      \n
      Is that correct?
      """
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  +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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31 DENIED edit 
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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              +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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            +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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          +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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        +body: """
          it worked! (at least in the sim)  \n
           thanks a lot!  \n
           I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
           I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
          """
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      +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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    +body: """
      So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
      \n
      Is that correct?
      """
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  +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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    +title: "What's a simplest way to get -5v from +/-12v?"
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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              +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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            +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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          +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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        +body: """
          it worked! (at least in the sim)  \n
           thanks a lot!  \n
           I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
           I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
          """
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      +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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      -bodyTs: "'100k':30 '1k':15,36 '5.05':27 '5v':24 'ah':1 'also':32 'bit':4 'get':23 'help':7 'instead':25 'invert':17 'littl':3 'll':22 'loop':18 'need':14 'realiz':9 'replac':34 'think':6 'v':28"
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    +body: """
      So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
      \n
      Is that correct?
      """
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  +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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        3: No commercial stuff, buying, selling or valuations.\n
        \n
        4: Be safe.\n
        \n
        ---
        """
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    +title: "What's a simplest way to get -5v from +/-12v?"
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    +body: """
      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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                +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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              +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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            +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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          +body: """
            it worked! (at least in the sim)  \n
             thanks a lot!  \n
             I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
             I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
            """
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        +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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      +body: """
        So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
        \n
        Is that correct?
        """
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    +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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  +body: """
    You’re right of course. Two more questions if you don’t mind:\n
    \n
    - 1. what’s the 1k || 100k doing?\n
    - 2. if you don’t want more than 5V at the output of the OpAmp, wouldn’t it be easier to just supply the OpAmp with 5V instead of adding a shottky diode which has a forward voltage of around 0.6V? As I understand the screenshot the voltage is 5.4V at that exact point and it could theoretically raise to 5.6V.\n
    \n
    At the moment you’re also mixing up your + input. 10V AC + 5V DC result in 7.5V input in your sim.
    """
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    +title: "What's a simplest way to get -5v from +/-12v?"
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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                +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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              +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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            +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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          +body: """
            it worked! (at least in the sim)  \n
             thanks a lot!  \n
             I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
             I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
            """
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        +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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      +body: """
        So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
        \n
        Is that correct?
        """
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    +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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  +body: """
    You’re right of course. Two more questions if you don’t mind:\n
    \n
    - 1. what’s the 1k || 100k doing?\n
    - 2. if you don’t want more than 5V at the output of the OpAmp, wouldn’t it be easier to just supply the OpAmp with 5V instead of adding a shottky diode which has a forward voltage of around 0.6V? As I understand the screenshot the voltage is 5.4V at that exact point and it could theoretically raise to 5.6V.\n
    \n
    At the moment you’re also mixing up your + input. 10V AC + 5V DC result in 7.5V input in your sim.
    """
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    +slug: "What-s-a-simplest-way-to-get-5v-from-12v"
    +title: "What's a simplest way to get -5v from +/-12v?"
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    +body: """
      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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                +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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              +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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            +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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          +body: """
            it worked! (at least in the sim)  \n
             thanks a lot!  \n
             I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
             I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
            """
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        +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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      +body: """
        So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
        \n
        Is that correct?
        """
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    +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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  +body: """
    You’re right of course. Two more questions if you don’t mind:\n
    \n
    - 1. what’s the 1k || 100k doing?\n
    - 2. if you don’t want more than 5V at the output of the OpAmp, wouldn’t it be easier to just supply the OpAmp with 5V instead of adding a shottky diode which has a forward voltage of around 0.6V? As I understand the screenshot the voltage is 5.4V at that exact point and it could theoretically raise to 5.6V.\n
    \n
    At the moment you’re also mixing up your + input. 10V AC + 5V DC result in 7.5V input in your sim.
    """
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    +slug: "What-s-a-simplest-way-to-get-5v-from-12v"
    +title: "What's a simplest way to get -5v from +/-12v?"
    +url: null
    +body: """
      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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                  +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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                +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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              +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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            +body: """
              it worked! (at least in the sim)  \n
               thanks a lot!  \n
               I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
               I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
              """
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          +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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        +body: """
          So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
          \n
          Is that correct?
          """
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      +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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    +body: """
      You’re right of course. Two more questions if you don’t mind:\n
      \n
      - 1. what’s the 1k || 100k doing?\n
      - 2. if you don’t want more than 5V at the output of the OpAmp, wouldn’t it be easier to just supply the OpAmp with 5V instead of adding a shottky diode which has a forward voltage of around 0.6V? As I understand the screenshot the voltage is 5.4V at that exact point and it could theoretically raise to 5.6V.\n
      \n
      At the moment you’re also mixing up your + input. 10V AC + 5V DC result in 7.5V input in your sim.
      """
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  +body: """
    1. it does nothing 😅 I just forgot to remove it from the sim\n
    2. you mean like power it with 0+5v? I think it won't work with negative input voltages then, right? and I'm using tl074 and I'm not sure that 0+5v is enough juice for it, and I use remaining 3 opamps for other stuff, so it's not really an option for me. the sim didn't have shottky diodes, so this measurements are not 100% accurate, but I used this approach to protect arduino inputs in another project, and it worked well. And yeah, I cranked up the input signal to +/-10v just to check the clipping, it'll normally stay within +/-5v\n
    \n
    I already ordered PCB for the prototype. I hope it'll work fine. Thanks a lot for your help :)
    """
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39 DENIED edit 
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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                  +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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                +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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              +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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            +body: """
              it worked! (at least in the sim)  \n
               thanks a lot!  \n
               I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
               I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
              """
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          +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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        +body: """
          So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
          \n
          Is that correct?
          """
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      +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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    +body: """
      You’re right of course. Two more questions if you don’t mind:\n
      \n
      - 1. what’s the 1k || 100k doing?\n
      - 2. if you don’t want more than 5V at the output of the OpAmp, wouldn’t it be easier to just supply the OpAmp with 5V instead of adding a shottky diode which has a forward voltage of around 0.6V? As I understand the screenshot the voltage is 5.4V at that exact point and it could theoretically raise to 5.6V.\n
      \n
      At the moment you’re also mixing up your + input. 10V AC + 5V DC result in 7.5V input in your sim.
      """
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  +body: """
    1. it does nothing 😅 I just forgot to remove it from the sim\n
    2. you mean like power it with 0+5v? I think it won't work with negative input voltages then, right? and I'm using tl074 and I'm not sure that 0+5v is enough juice for it, and I use remaining 3 opamps for other stuff, so it's not really an option for me. the sim didn't have shottky diodes, so this measurements are not 100% accurate, but I used this approach to protect arduino inputs in another project, and it worked well. And yeah, I cranked up the input signal to +/-10v just to check the clipping, it'll normally stay within +/-5v\n
    \n
    I already ordered PCB for the prototype. I hope it'll work fine. Thanks a lot for your help :)
    """
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40 DENIED moderate 
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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                  +body: "Supply the OpAmp with +/-12V or +5/0V and use a non inverting Summing OpAmp Circuit to get your 0-5V signal. V1 is 5V, V2 your input."
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                +body: "thanks! gonna give it a try tomorrow. I'm pretty new to this, and never used opAmps in non-inverting configuration, so I missed this option"
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              +body: "Exiting! It has been some time for me too, let me know how you solved the problem at the end."
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            +body: """
              it worked! (at least in the sim)  \n
               thanks a lot!  \n
               I'm not sure I got all the math right, since I get 0 - 5.05V on the output, but it's not a deal breaker for me.  \n
               I attached the schematics, but not sure that images in comments federate from kbin to lemmy, so if you don't see it, try opening an original link to this comment.
              """
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          +body: "ah, a little bit of thinking helped me realize that I don't need 1k in inverting loop and then I'll get 5v instead of 5.05v :) and 100k can also be replaced by 1k"
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        +body: """
          So what should happen if you replace the 1k in the inverting loop by 0 Ohm is, you should get a 5V square wave.\n
          \n
          Is that correct?
          """
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      +body: "No, with 0 Ohm I get a perfect 0+5v sine, just as I need. It's the other way round, it'll amplify the signal and clip off the top at about + supply voltage when you increase the resistance in the feedback loop, but it's not exactly square wave, as the bottom part of sine will remain intact. I use clipping schottky diodes to protect the arduino from voltage outside 0+5v range, this way if you increase input signal to say 20v peak to peak, you'll get more square-ish wave in 0+5v (I've attached the schematics)"
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    +body: """
      You’re right of course. Two more questions if you don’t mind:\n
      \n
      - 1. what’s the 1k || 100k doing?\n
      - 2. if you don’t want more than 5V at the output of the OpAmp, wouldn’t it be easier to just supply the OpAmp with 5V instead of adding a shottky diode which has a forward voltage of around 0.6V? As I understand the screenshot the voltage is 5.4V at that exact point and it could theoretically raise to 5.6V.\n
      \n
      At the moment you’re also mixing up your + input. 10V AC + 5V DC result in 7.5V input in your sim.
      """
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    1. it does nothing 😅 I just forgot to remove it from the sim\n
    2. you mean like power it with 0+5v? I think it won't work with negative input voltages then, right? and I'm using tl074 and I'm not sure that 0+5v is enough juice for it, and I use remaining 3 opamps for other stuff, so it's not really an option for me. the sim didn't have shottky diodes, so this measurements are not 100% accurate, but I used this approach to protect arduino inputs in another project, and it worked well. And yeah, I cranked up the input signal to +/-10v just to check the clipping, it'll normally stay within +/-5v\n
    \n
    I already ordered PCB for the prototype. I hope it'll work fine. Thanks a lot for your help :)
    """
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
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      Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do what I want. The only problem is that it needs -5v to shift the signal to be unipolar. I know that I can invert +5v using another opamp, but maybe there's some simpler way? I'd really like to avoid adding another opamp just for this? In this schematic I used simple voltage divider to get the needed voltage, but I guess that's not the best approach?\n
      \n
      TLDR: I have -12v, 0v, +12v and +5v, what's the easiest way to get -5v?
      """
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