askelectronics

I have a 3D printer and have a special filter that has two 24V blower fans that are connected in parallel. Unfortunately my printer doesn’t have the proper connectors for the fans. So if I purchase something like this power jack adapter I know the adapter is 12V not sure if that would make a difference. Anyway if I connect the...

I am curious if one, something like this exists, and two what the cost might be? I am looking for a screen, I assume an e-ink is the best/cheapest option and I want it to be as close as possible to the size of a playing card, ideally not thicker than 2MM. But I think up to 5mm could work....

I’m interested in learning how to make a proper PCB rather than perf board with wires all over the place.

I want to replace one half of this with longer wire, but I am not confident about the name of the connector used....

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 have two led strips used for 2x27" monitor bias lighting. Each have their own USB cables for power. These two USB cables are plugged into a 2-port wall charger for a phone. I would like to use a 2x female to 1x male adapter to join the two USB cables into one, then plug it into a much smaller 1-port USB wall charger. The...

I’m trying to use an RPi Pico W as a temp/humidity sensor using a DHT20....

I am powering a 5V microcontroller (arduino clone, atmega328p) using a 9V block and a buck converter. Now I want to let the microcontroller occasionally measure the battery voltage, so I can get an idea of how full it is....

This is my electromagnet.

I’ve recently bought a used computer, and it has a few problems. I’m looking for a guide to help me identify which parts are causing the problem....

Currently, only one company in the world – ASML – has the technological capability necessary for the creation of photolithography machines which are sufficient for the production of modern semiconductor devices. What I’m wondering is at what point does semiconductor manufacturing become practical, or even feesible for...

The lower part of my screen is updated one frame earlier than the upper part. I was able to isolate the error to the HDMI output of my laptop. The screen or cable is not broken, as I don’t get these errors with other connected devices. I am assuming it is some hardware defect. Does anyone know what it could be and how I could...

I’m trying to build a esp8266 weather station and got some MCP1700-3302E to power the esp8266 from a lipo. But when I connect the lipo to the MCP1700 (looking at it flat spot at the front, ground left, Vin in the middle and Vout on the right) I get no output at Vout. I googled and could not find anything. I tested 5 different...

Disclaimer: this is not specifically for a commercial product, but various things I design sometimes get commercialized. I mention this so that you may decide whether you want to weigh in. If it’s commercialized, I will probably make very little money but a bunch of university students may get a neat STEM program in the...

Hey all, have I damaged this xbox 360 controller circuit board beyond repair?...

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...

Hello,...

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....

I replaced my laptop’s battery after it was swollen. I found out that services like call2recycle do not take swollen batteries since they are potentially hazardous material. How can I get rid of that damned spicy pillow? In Dallas. Thanks....

Hey everyone,...

I’m trying to replace the jet engine fan inside the PSU of a Nu 1.1 with a Noctua equivalent and am having trouble identifying the connector. The PSU is a Delta Electronics Model EDPS-250AB A, Part Number 400-5494-91....

Is there a reason why the banner and logo of this community are just the reddit logo?...

I'm taking apart a broken tape recorder produced in the 70s (a Tesla B57, made in Czechoslovakia), to harvest some parts (inductors, switches, ...) and maybe reuse the case for some project....

I have to fix a slightly very stupid mistake that I’ve made....

I have some metal film 1/2w 2.2ohm resistors in some car wiring. I’m concerned about the durability of this install and am seeking advice on how to protect the resistor once it’s soldered in place. The obvious is heat shrink tubing, but it’s there anything more substantial?...