askelectronics

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, this post is structured similarly to r/PrintedCircuitBoard 's review request format. Since we don’t have any PCB communities over here yet, I thought that this might fit in here and can maybe spark some friendly discussion....

Solution: @DJPhil has made some really insightful comments below, which are really useful. If you just want the cap you can set the parametric searches for 660uF, or in September 2023 I’ve found that digikey stock(s/ed) chemi-con EKHJ451VSN661MA59M....

So I’m doing some testing of USB-C cables using a tester and a constant load (I’ll have another post soon with some questions on this). But before running each test, I’m checking the E-mark chip and then enumerating the charge capabilities of each to see what they report being capable of....

Hello,...

I want to power this board with a 14v battery. The board has a 1s battery connector that can power the board and read the voltage via ADC. Is there something I could place between the two to lower the voltage and still have a battery voltage reading? I would not be charging the battery through this. The usb port would not be...

Hi, my cousin has an Xbox Series S, and anytime he would move it the fan would make some pretty freaky noises....

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....

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...

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....

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...

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....

Is there a way to figure out my LED board and fix it myself? I got this LED light which works perfectly but the issue is the usb charger port on the left is not working for whatever reason. There are two ports one micro for charging the led and one usb for outlet charging. Is there a way to switch the charging to the usb port?...

I am making a graphics card on the tang nano 20k board. I tried synthesising the design in the official IDE and it output:...

Hello! What would be a good way to learn about electronics in terms of creating them? I’m particularly interested in building my own keyboards and other PC peripherals, but I’m not sure what tools I would need, or what’s a good knowledge base if I run into any issues. Any tips and or suggestions?

Thanks for all your votes and comments. From the icons that were submitted as requested, the results were as follows:...

In a transformer, why are both coils apart from each other? Wouldn’t make more sense to have the ferrite core (tube shape), wind the primary coil around that and then wind the secondary coil on top of the primary? So that the magnetic fields are as close to each other as possible?

https://lemmy.world/pictrs/image/e3b1352d-ae56-473a-b5f7-7460458359f6.jpeghttps://lemmy.world/pictrs/image/6537cbe0-6313-46d9-8647-3708de4773bf.jpeg

Serious question from a beginner in electronics. For reasons I do not fully understand, I have become fixated on the idea of collecting small amounts of electricity from “interesting” sources. I don’t mean “free energy”, instead, I mean things like extracting a few mV from being so close to a AM radio tower using two...

My wife gifted me this super cute mini miffy diorama from a gachapon. It uses two 1,5V cells and has a tiny led in it. I would really love to to add a 24h timer. ( it should stay on for 4 hours after turning it on then go to “standby” for 20h before turning back on) Do you guys think an attiny85 is the right thing for the...

Hi,...

I got my hands on an old e-ink price tag and want to repurpose this display....

Hi, I am automating my manual switches at home with ESPHome on NodeMCU. For controlling the switches, I am using 8 channel relay module....

Hi everyone! Recently I have gotten interested in communication protocols and have been looking for one (with little success, hence my question) which would satisfy the following requirements (in prioritized order):...