Some time ago, we were approached by PCBway about getting sponsored PCBs for review. I actually got pretty hyped, as I never had sent a PCB to be manufactured before. Even tough I have designed some PCBs for milling at home, they have to be very simple. A little background, almost everything I write here […]
GM328A reverse engineering, new firmware and Tetris!
Welcome! In this post I talk about the reverse engineering of the GM328A transistor tester. I have drawn the schematics of the board and compiled new firmware for it. As a bonus, I also programmed Tetris for it. Intro Some time ago I wrote an article where I programmed one T3 LCR meter / transistor […]
This is going to be a quick post (compared to the average post here). I recently was in need of a USB to MIDI adapter, wanted to test a midi implementation on a ATmega8 and also check out VCV Rack with my keyboard, which is pretty old and only has a legacy MIDI connection. I […]
Fixing my dead USB ports
Intro I spend most of my spare time on electronics. Not always building circuits or gadgets, sometimes just reading or watching videos. If you are reading this, you probably do the same. Thus, you can imagine my pain when I stuck a circuit I was testing on one of my laptop’s usb ports and it […]
Milling PCBs with the Arduino T8 CNC
Intro Some time ago, I was browsing some Internet when I believe I got and ad to a CNC milling machine from gearbest. It was 30% off and at time (140$, plus 40$ for shipping to Brazil) and it did seem to be a very good deal. I ended up buying it, but why would […]
USBASP, a cheap retro controller adapter?
Intro Long ago, I stared at my trusty USBASP and asked myself if it was possible to convert it to a USB adapter for a Mega Drive(Genesis) controller. At the time I still did not even know about V-USB or that the USBASP used it. As I write this, I got it working recently, with […]
Getting the T-Rex Endless Runner to work on a Component Tester
Intro Some time ago I got one of these transistor testers on eBay for around 10$. It is quite useful, specially because my multimeter does not measure capacitance or inductance. I did a samll write up about it in portuguese here. First thing I noticed was the popular Atmega 328p on the back of the […]