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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....
I recently came to the realization that I’ve been kinda punishing myself with cheap no-name solder that is really difficult to work with....
It’s an SPST-NO micro switch. Don’t waste time searching for it. I already wasted mine. Just let me know what it is if you know it off the top of your head. 😊
Trying to repair a Hyperkin Duke Xbox controller where the left trigger doesn’t respond. Found that the resistance of this potentiometer doesn’t change when it’s moved, so I’m looking to replace it. I’m a novice with this stuff though and I’m having trouble identifying it. Any help is appreciated.
I’m planning to make a modular synth from scratch, but I need to start with the PSU. Do you see any issues with this schematic?...
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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...
Some years ago, before LEDs were a thing, I bought an Ultrafire WF-500 Flashlight that features a Xeon light bulb. As you might imagine the bulb reached its lifetime and burned away....
Hey friends,...
Hi, I am automating my manual switches at home with ESPHome on NodeMCU. For controlling the switches, I am using 8 channel relay module....
It’s the handle of a water kettle. Behind the circuit board is nothing. There is also no other circuit board in the kettle. Is the yellow thing the beeper? Thanks for any help 🙏
Hi all, I have a water pump connected to an adapter (pictured) but I am having trouble getting it to run using any of the cords I had on hand; it calls for using DC-only & 12V (between 9-14). I have tried Googling around & browsing Amazon but I’m a bit overwhelmed with options. Can anyone suggest an adapter that’ll get this...
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I got my hands on an old e-ink price tag and want to repurpose this display....
//Edit: It’s a SAS drive. thanks for the help :))...
https://lemmy.world/pictrs/image/24d865e4-966e-416c-937d-321e4ffa3b39.pnghttps://lemmy.world/pictrs/image/d4e99546-a304-439a-b5d9-ebf6b9676eb8.pnghttps://lemmy.world/pictrs/image/d5cec647-3fb6-456b-b1fd-7b7d2059358d.png
I have a whole bunch of them. They are possibly a bit older (70s, 80s) judging by other contents of the junk box they are from....
First of all, I apologize for the lack of a “formal” schematic… I tried to draw one out, but got buried in the nuances of it :)...
What I've done is take a large 2n3055 BJT NPN power transistor, and decap it (it is a large metal-can type). Then I carefully removed any coating from the exposed silicon (it typically has a dab of silicone potting compound on it)....
Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from here using what I have...
Since I never understood op-amps from reading or practicing problems I wanted to build a circuit to probe around and use different resistor values to set the amplification....
Mates bread maker stopped working so I had a look inside and saw this burned resistor....
Hello there, This oscillator is a 0V +10v DC oscillator, which after current passes through the capacitor, it produces a -5v +5v AC on the resistor....
I’m trying to repair an arcade PCB with intermittent audio. The board on top is the audio board, the bottom board is the everything else....
