askelectronics

Just exploring about this tp-link XN020-G3v router. I’m mostly interested in connecting to the UART, won’t be tinkering with electronics of it, but out of curiosity I tried to search what these chips are. and I couldn’t find much about the big chip. Can anyone describe the 4 main chips on it ? Best would be datasheet, but...

Im building a flashlight and i want to test if a fan in it would be a good idea but the flashlight is really small so i would need a motor thats smaller than 1 cm preferably. I found really good ones at maxon group but unless you order them in bulk(1000+ units) they cost like 400€. So do yall know anywhere i could find them?...

I migrated here in the US (specifically in San Bernardino, CA). Quick Intro: I’m a graduate electrical engineer; honestly, I really don’t have that much experience and not even a decent internship experience due to covid, resulting in an online OJT. Do you think doing an internship here in the US is the way to go? If yes,...

hi again, since i had a bad idea in my last post i wanted to try again to get some feedback i could understand and apply....

My Google-fu has completely failed me. I’ve got an RGB addressable led curtain. It has 20 strings of 20 LEDs in a square arrangement. I initially assumed it had a wire feeding led data back up, to go to the next drop. On checking however, they are T jointed....

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...

Hi, I have built a microvawe transformer spotwelder, I have put a single turn of welder wire for in the secondary and I’m timing it with arduino. Worth mentioning it was/is a 230V transformer. Electrodes are sharpened copper rods. I believe the voltage is still high. The spotwelds it produces are slightly discolored and not as...

The purpose of this PCB is to be small, have ok RF performance, and use USB as main power-source and interface. (Off course it has UART if USB is not available) this is just a somewhat challenge I set myself to design a esp32 PCB with the IC without a already made module....

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...

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

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...

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...

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 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?...

Hello! I bought 30 simple UV leds (those with a big and a small leg, not a single strip). I’m trying to build a UV station to dry my resin but idk how to proceed. I tryed watching some videos but there is a lot of math to build that and I can’t do it. I have 30 led lights, 5 resistors of 100 and 5 of 300. I wanted to use AA...

Hello y’all! I’ve always been interested in computers and programming for as long as i can remember, but recently i’ve decided to try to get into some of the deeper stuff behind that, into the wonderful world of electronics. Where should I start? What courses or books or youtube series should I consume? What are some...

My project is a “breathing” white 12v LED strip controlled by an esp32 on a dev board, and switched with an IFLZ44N mosfet....

So I’m a refrigeration tech with some electronics manufacturing experience. But I’ve never combined the 2 skillsets so I’ve been toying with the idea of building a large vapor chamber to cool a computer via direct immersion in a refrigerant. I know its about as far from practical as you can get but it sounds like fun....

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

I’ve recently acquired an uncalibrated Philips PM2534 (edit: the battery-backed factory calibration data was lost due to the battery running out). I’m looking into somehow getting it calibrated. However, the calibration procedure is rather involved, and requires such things as an exact 300V DC (the service manual recommends...

I want to change te battery setup in the camper van a bit....

Hey friends,...

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...