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Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA batteries. Do I need 8 of them?? Its not going to be turned on for long, just some 30 seconds at a time.\n
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Rules\n
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\n
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\n
Rules\n
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Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA batteries. Do I need 8 of them?? Its not going to be turned on for long, just some 30 seconds at a time.\n
\n
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Show voter details
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\n
Rules\n
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Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA batteries. Do I need 8 of them?? Its not going to be turned on for long, just some 30 seconds at a time.\n
\n
Can someone help me?
"""
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| 7 |
DENIED
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edit
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Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA batteries. Do I need 8 of them?? Its not going to be turned on for long, just some 30 seconds at a time.\n
\n
Can someone help me?
"""
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Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA batteries. Do I need 8 of them?? Its not going to be turned on for long, just some 30 seconds at a time.\n
\n
Can someone help me?
"""
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\n
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\n
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\n
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Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA batteries. Do I need 8 of them?? Its not going to be turned on for long, just some 30 seconds at a time.\n
\n
Can someone help me?
"""
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Do you have a datasheet/part number for the LEDs, or at least a picture and diameter?\n
\n
Because battery voltage reduces over time, the LEDs will get dimmer as the battery drains fairly quickly. If possible, running it off a mains plugpack (e.g.12V like for a router or external hard drive) would be good.\n
\n
[An example UV LED](https://www.jaycar.co.nz/medias/sys_master/images/images/9964897337374/ZD0260-dataSheetMain.pdf) has a forward voltage of nominally 3.7V. Two in series on a 12 (8x1.5V) supply gives us 12V-(2x3.7V) =4.6V to drop across the resistor. We want ~15mA, so need a very roughly (V/I =R) 4.6V/0.015A=300 ohm resistor.\n
\n
When the battery is nearly discharged, at 1.1V/cell it will be 8.8V, giving 1.4V across the resistor and V/R=I 1.4V/300ohm= 4.7mA.\n
\n
So you would connect each pair of LEDs as:\n
\n
BAT+ RES +LED- +LED- -BAT all in series. [Like this](https://www.overclockers.com.au/wiki/images/a/a0/LEDSeries-parallel.GIF).\n
\n
You’ll need another 10 300 ohm resistors for 15 total, one per pair of LEDs.
"""
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Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA batteries. Do I need 8 of them?? Its not going to be turned on for long, just some 30 seconds at a time.\n
\n
Can someone help me?
"""
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Do you have a datasheet/part number for the LEDs, or at least a picture and diameter?\n
\n
Because battery voltage reduces over time, the LEDs will get dimmer as the battery drains fairly quickly. If possible, running it off a mains plugpack (e.g.12V like for a router or external hard drive) would be good.\n
\n
[An example UV LED](https://www.jaycar.co.nz/medias/sys_master/images/images/9964897337374/ZD0260-dataSheetMain.pdf) has a forward voltage of nominally 3.7V. Two in series on a 12 (8x1.5V) supply gives us 12V-(2x3.7V) =4.6V to drop across the resistor. We want ~15mA, so need a very roughly (V/I =R) 4.6V/0.015A=300 ohm resistor.\n
\n
When the battery is nearly discharged, at 1.1V/cell it will be 8.8V, giving 1.4V across the resistor and V/R=I 1.4V/300ohm= 4.7mA.\n
\n
So you would connect each pair of LEDs as:\n
\n
BAT+ RES +LED- +LED- -BAT all in series. [Like this](https://www.overclockers.com.au/wiki/images/a/a0/LEDSeries-parallel.GIF).\n
\n
You’ll need another 10 300 ohm resistors for 15 total, one per pair of LEDs.
"""
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Show voter details
|
| 12 |
DENIED
|
moderate
|
App\Entity\EntryComment {#4037
+user: App\Entity\User {#4020 …}
+entry: App\Entity\Entry {#2419
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+magazine: App\Entity\Magazine {#265
+icon: Proxies\__CG__\App\Entity\Image {#246 …}
+name: "askelectronics@discuss.tchncs.de"
+title: "askelectronics"
+description: """
**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
\n
3: No commercial stuff, buying, selling or valuations.\n
\n
4: Be safe.\n
\n
---
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+slug: "30-UV-led-circuit"
+title: "30 UV led circuit"
+url: null
+body: """
Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA batteries. Do I need 8 of them?? Its not going to be turned on for long, just some 30 seconds at a time.\n
\n
Can someone help me?
"""
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+body: """
Do you have a datasheet/part number for the LEDs, or at least a picture and diameter?\n
\n
Because battery voltage reduces over time, the LEDs will get dimmer as the battery drains fairly quickly. If possible, running it off a mains plugpack (e.g.12V like for a router or external hard drive) would be good.\n
\n
[An example UV LED](https://www.jaycar.co.nz/medias/sys_master/images/images/9964897337374/ZD0260-dataSheetMain.pdf) has a forward voltage of nominally 3.7V. Two in series on a 12 (8x1.5V) supply gives us 12V-(2x3.7V) =4.6V to drop across the resistor. We want ~15mA, so need a very roughly (V/I =R) 4.6V/0.015A=300 ohm resistor.\n
\n
When the battery is nearly discharged, at 1.1V/cell it will be 8.8V, giving 1.4V across the resistor and V/R=I 1.4V/300ohm= 4.7mA.\n
\n
So you would connect each pair of LEDs as:\n
\n
BAT+ RES +LED- +LED- -BAT all in series. [Like this](https://www.overclockers.com.au/wiki/images/a/a0/LEDSeries-parallel.GIF).\n
\n
You’ll need another 10 300 ohm resistors for 15 total, one per pair of LEDs.
"""
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date: 2023-10-03 23:54:30.0 +02:00
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} |
|
Show voter details
|
| 13 |
DENIED
|
edit
|
App\Entity\Magazine {#265
+icon: Proxies\__CG__\App\Entity\Image {#246 …}
+name: "askelectronics@discuss.tchncs.de"
+title: "askelectronics"
+description: """
**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
\n
3: No commercial stuff, buying, selling or valuations.\n
\n
4: Be safe.\n
\n
---
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Show voter details
|