What is the least shitty shit store? Never had a good experience with any of the shops such as, wish, aliexpress and the rest of em. But which one of them is considered the better one, or more likely to actually arrive with the correct item? Is etsy considered better than the rest? Are there any of these “low priced” stores...
I got these TP4056 modules from an AliExpress vendor and fail to understand how the protection circuit works or if it’s just typical Ali shovelware. It could be my limited understanding of electronics....
Yes that I found as well but have/had trouble understanding why it would be built like this. Also why a MOSFET would be designed internally like this. If you want more power capability you’d get a bigger MOSFET rather than two tiny ones in parallel right?
It’s related to the internal body diode of the N channel mosfet, so two of them are in series but reversed. When one MOSFET is activated, current may flow easily in one direction but be reduced by the body diode of the other. When both are activated, current may flow easily in either direction.
It seems they don’t really prevent discharging or charging separately due to the body diodes but they can cut off the battery alltogether.
Since MOSFETs have a gate capacitance you’d want to limit the inrush of current from the output of a microcontroller to prevent it from getting damaged prematurely. That’s what gate resistors are usually good for....
That’s good. My switching frequency is a few times per hour.
I am a little bit concerned that the slow rise/fall time make the MOSFET go outside its operating parameters for a fraction of a second. The resistance gradually changes meaning the mosfet will dissipate more power but also less current will flow.
So if you switch many times per second the gate capacitance with the resistor acts as a low pass filter reducing the gate voltage.
2024 is the Year of Linux on the Desktop, at least for my boyfriend. He’s running Windows 7 right now, so I’ll be switching him to Ubuntu in a few days. Ubuntu was chosen because Proton is officially supported in Ubuntu.
Yeah true. I went through the arch process to learn about Linux though so it was worth it in the end but I still have no clue about selinux, apparmor etc that are shipped by default in other distros. Also the need for firewalls/antivirus which isn’t really an issue in Linux but still.
This is a $1 dollar increase from what I was paying. But soon subscribers will be $15/month, then $20/month. I wonder how much of deezer’s income actually goes to the artists.
Does anyone recognise these power supplies? They’re cheap AliExpress led drivers and I want to change its output voltage to around 22V from 12V. I’ve read that the way to do this is to adjust the REF voltage on the IC that controls it. It’s a KA3845 but I don’t understand where that reference voltage is regulated. One...
Well there certainly is some regulation because attaching a load does not decrease the voltage by much. Increasing the voltage is indeed ambitious for the 12V model but lowering the voltage of the 12V model seems doable.
Replying to myself for informational reason. Modifying voltage was more or less successful. Both optocouplers transmit a reference voltage, so both need to be adjusted simultaneously.
This can be done by changing the value of R19, a 23.2k smd resistor close to the output terminals.
I’ve attached a 10k pot with a 10k and 6.8k resistor in series and successfully modified the voltage down to 22.5.
The power supply itself is a piece of crap though. It claims to handle 400W but anything over 150W causes the short circuit protection to activate, never mind overheating at 150W very quickly.
Polish margarine for baking and frying. (s.mamotoja.pl)
He was like a brother to me... (startrek.website)
What is the least shit online store of the shitty ones? such as: Wish, AliExpress, etc..
What is the least shitty shit store? Never had a good experience with any of the shops such as, wish, aliexpress and the rest of em. But which one of them is considered the better one, or more likely to actually arrive with the correct item? Is etsy considered better than the rest? Are there any of these “low priced” stores...
Essential NPC (slrpnk.net)
Dont be fooled by cable news (lemmy.world)
How many Star Trek fans will see red because they don't see red? (lemmy.world)
TP4056 useless protection circuit? (discuss.tchncs.de)
I got these TP4056 modules from an AliExpress vendor and fail to understand how the protection circuit works or if it’s just typical Ali shovelware. It could be my limited understanding of electronics....
MOSFET gate resistor
Since MOSFETs have a gate capacitance you’d want to limit the inrush of current from the output of a microcontroller to prevent it from getting damaged prematurely. That’s what gate resistors are usually good for....
What is a nifty little feature modern gadgets have lost? (lemmy.world)
For me it’s the notification light you used to find on older phones, was particularly good to know if your phone was charged without picking it up
She was right in 1992, the Catholic Church is still filled with pedophiles. (lemmy.world)
Year of Linux on the Desktop (lemmy.world)
2024 is the Year of Linux on the Desktop, at least for my boyfriend. He’s running Windows 7 right now, so I’ll be switching him to Ubuntu in a few days. Ubuntu was chosen because Proton is officially supported in Ubuntu.
Linux mint = best beginner distro (lemmy.ml)
It's funnt because it's true (fanaticus.social)
Using the "frog in boiling water" technique (lemmy.world)
This is a $1 dollar increase from what I was paying. But soon subscribers will be $15/month, then $20/month. I wonder how much of deezer’s income actually goes to the artists.
Why not? (media.mas.to)
Rollin'! Rollin'! Rollin'! (slrpnk.net)
Listen, Susan. It's a valid theory, just look at the damn thing. (mander.xyz)
Adjusting SMPS output voltage (discuss.tchncs.de)
Does anyone recognise these power supplies? They’re cheap AliExpress led drivers and I want to change its output voltage to around 22V from 12V. I’ve read that the way to do this is to adjust the REF voltage on the IC that controls it. It’s a KA3845 but I don’t understand where that reference voltage is regulated. One...