Reddit:Electronics

Hi my laptop died and started to troubleshoot it. I found capacitors in these portion of motherboard to be shorting. Upon injecting voltage on one of the caps, this chip “eHCSA” was getting hot on FLIR camera. Does anyone know what this chip is and where can I order one? Can’t seem to find any on Aliexpress

broken transformer, insanely dodgy mains power switch (probably Stolen from a lamp sometime) and a shitty solder Job on a 7805 all added up to the thing ending in the scrap pile. fixing all these things made it work again, have to say is a decent low voltage low current supply.

They are now making 64 bit full Linux capable processors under the “STM32” name. I can understand putting the STM32MP1 series under the STM32 brand, but this should just be a new line of chips at this point.

I know enough about electronics to get myself in trouble but not much more. My wife's Grandpa had this old 8mm projector and looks like a capacitor was added at some point. It hooks up inside to this transformer (I think). The projector surprisingly works great! But the motor starts to slow down after running for 10-15 min and the capacitor gets real hot. I'm assuming it's going out? As soon as the motor started slowing down I turned it off so I wouldn't break anything. Any ideas on what the specs would be for this capacitor? I looked online and couldn't find any info on a "R50T1 Mallory" capacitor. Any guidance would be greatly appreciated?

I’m a senior hardware engineer and one of my favorite pastimes is to take electronic kits that are online or in store and see if I can approve on them a little bit one way or another.

I seen this mini “pong” retro arcade kit for pretty cheap and I was like oh, this is screaming for a custom 3-D printed case. Though after I assembled it, I found out that the biggest weakness was it had one of those really tiny piezo speakers. It was also enclosed in the case, so it was really quiet, so I added a KA386 amplifier that I had laying around. This worked pretty well and made it way louder. It’s probably not the most quality audio amplifier these days, but it’s dirt cheap and it works for the 8 bit sounds.

First Project that has moved from breadboard to something more permanent. None of the potentiometers are square, and some of the solder joints may make you cringe. But that's how we learn. The code runs about 350 lines of circuitpython. What is it? A fencing training assistant.

To commemorate the 38th anniversary of Chernobyl, we're launching OpenRad - an open-source project for building your own radiation dosimeter! Built on ESP32 TTGO T-Display and the SBM-20 Geiger tube, OpenRad allows you to monitor environmental radiation.
Full details & instructions on the Hackaday project page and GitHub repository:
Hackaday project page: https://hackaday.io/project/195778-openrad
Hackster: https://www.hackster.io/omarkhkhorshid/openrad-a-simple-dosimeter-powered-by-esp32-cee321
GitHub repo: https://github.com/omarkhorshid/OpenRad
YouTube video: https://www.youtube.com/watch?v=kaBPnBUhCXA

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