What's your solder of choice? (images2.imgbox.com)
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....
can you see a beeper in this image? (lemmy.ml)
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 🙏
Help finding value of burnt resistor. (lemmy.nz)
Mates bread maker stopped working so I had a look inside and saw this burned resistor....
What type of connector is this ? (discuss.tchncs.de)
//Edit: It’s a SAS drive. thanks for the help :))...
When I was a kid my Dad made a magnet charger with some electrified copper coils would this be something that could be used to achieve similar results somehow? TIA (i.imgur.com)
Small fan switch sanity check. (lemmy.world)
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...
Shift register missing bits (discuss.tchncs.de)
Hey friends,...
Non-Inverting LM358 Circuit Not Working (discuss.tchncs.de)
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....
Transistor particle detector not functioning as expected (voltage.vn)
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)....
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...
I tried to make an electromagnet at home but when I connect the two copper wires to a 1.5V battery it keeps short circuiting and heating up. Also it doesn't attract other nails. (lemmy.world)
This is my electromagnet.
Replacement Bulb for Ultrafire WF-500 Flashlight (cdn.tcb13.com)
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....
A couple of icon x the group (lemmy.world)
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
How to remove press fit connectors (discuss.tchncs.de)
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....
Shift register > Relays - inconsistent results when load is attached to relay (discuss.tchncs.de)
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 :)...
replacement for male connector (beehaw.org)
Looking to replace the male connector in this picture. Any idea what it is called and where I can get it? I'm in Germany.
Can someone help me identify this potentiometer from a third party Xbox controller? (lemmy.one)
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.
What is this e-paper connector? (feddit.de)
I got my hands on an old e-ink price tag and want to repurpose this display....
How could a DC oscillator produce AC after a capacitor? (discuss.tchncs.de)
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....
Connecting several tracks to the same pad (discuss.tchncs.de)
Hello everyone! I’m designing a PCB and I have some doubts about how to connect the 4 resistors at the top to capacitor C34. They are 4 traces, and all of them terminate at the same pad of the capacitor. As I have currently placed them, are they connected correctly? Or should I connect them in a different way?
Is this one-piece battery-to-PCB "clip" standard (for easy replacement) or a custom piece? +PCB pad ? (discuss.tchncs.de)
Hello,...
Does any one know about a this ad8445 /lm8445 ic it is supposed to be a timer ic but i am unable to find a data sheet for it (lemmy.world)
https://lemmy.world/pictrs/image/e3b1352d-ae56-473a-b5f7-7460458359f6.jpeghttps://lemmy.world/pictrs/image/6537cbe0-6313-46d9-8647-3708de4773bf.jpeg
How do you guys enclose relay modules into the switch board? (lemmy.world)
Hi, I am automating my manual switches at home with ESPHome on NodeMCU. For controlling the switches, I am using 8 channel relay module....
Radial resistors... has anybody seen these before? (discuss.tchncs.de)
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....
Help finding replacement charging jack (discuss.tchncs.de)
I have a acer c740 chromebook that has a cracked charging jack hoping I can find replacement part for it. Picture attached shows what's left of some number on it I think it's 150726+F4 not sure what the symbol is. The male end end is 3mm od 1.1mm Id if that helps.
