askelectronics

So, I’ve got a laptop screen that’s giving up on me. 2/3 of the screen runs alright but the 1/3 on the left edge is acting weird. Half of the broken section displays an image but the image smudged and weird, while the other half is just dead. I opened it up to see what’s up and, lo and behold, a wee tiny capacitor is...

Does anyone have any advice on routing some high speed signals on flex PCBs? I’m looking at jlcpcb because of the low cost but I’m having difficulty getting impedances to be decent....

Hy I bought a cheap Yagi wifi antenna need some help cause the previous owner broke it and tried to fix it red neck style… It didn’t work … I hope I would be able to add a picture here is a breaf description anyway it’s the cheapest brand you can find online the main element is formed into an oval shaped metal ring and...

I’m trying to use it as a water pump for my aquarium. I’m using a 6V 4.5AH battery with a DC step up convertor to power the pump. After about 5 minutes it gets really hot. Is this expected?

Hello, and thank you in advance....

So I used something like these some years ago to recover data off a phone, but I was wondering if the reverse is possible in having a bga soldered adapter with a microsd slot on top. Or if PCBs can even be soldered together like that. I’ve never actually checked if bga chips have raised pads or something. The purpose would be...

This was a switch that got its wires pulled out. I learned how to desolder today in order to remove it from the little switch board and now there’s three holes where this used to be. Does this component have a name, because I’m wondering whether I can just get a replacement one like this. There are lots of tools and supplies...

I am looking for some sort of big programmable buttons. Not sure if something simple exists....

LEDs will conduct more current when they get warmer and differences between individual LEDs mean you cannot easily put them in parallel. A constant current DC supply will be good enough for part of the LEDs but will overload some others. To normalize current a series resistor is used with each individual LED....

Hello Lemmings, Hope you guys are doing well....

This is an idea that entered my mind. The traditional way is applying some etch resist like toner or dry film, etching away the copper and then adding solder mask before populating the board with components....

Ever since I’ve gotten into Retro Computing, I’ve been confronted about things like soldering, Circuits and Electrics in general… and it has made me want to try experimenting with my own ideas!...

It appears to me that UV resin, used for SLA printers should be quite convenient for making PCBs with a laser etcher. You can spread a thin layer of resin on the board and quickly expose it using a laser engraver. It should be most convenient for silkscreen layers that are otherwise difficult to apply....

Hello,...

Hey guys i cant find any usefull guide on how USB c charging works in depth. In particular i have bought a pair of Sony headphones which i would like to make wireless change so I also bought a crappy wireless coil meant to convert a phone into wireless charging. i opened the headphones, located the ground and 5v pin coming from...

Seriously, what sadist saw a flat PCB surface, flat pick and place machine heads, and said “lets create a round component”?...

Greetings again! Yesterday I posted the schematic for this circuit, and today I have routed it as a 2 layer PCB. The intent of this board is for it to be a playground to build autonomous LED animations with the LP5812 ICs from TI, which seem pretty neat....

Greetings! I’ve been throwing this schematic together as I want to experiment with the TI LP5812 IC which is an i2c controlled autonomous matrix LED driver. I am a novice when it comes to electronics so I’m looking to see if I’ve missed anything in this demo board schematic....

Besides putting too many devices on a single wall socket, that draw too much power, what is supposed to happen?...

I think (hope/pray) that the SATA cable in my laptop is failing. Though when looking on amazon for a replacement all of them imply specificity to single type of laptop ("compatible with “xyz1, xyz2, etc.”); however, aren’t all SATA connectors generic?...

Hi,...

I have a Mission MS 200 Subwoofer where the power supply has stopped working. I was quite happy with it, and would like to try to fix it, also I don’t have the money for another. I have taken it apart and have narrowed the fault down to the PSU. I have visually inspected the solderings and components, and nothing obvious is...