Welcome to my self-presentation website and techblog. This site is also my public technical notebook and portfolio. I use it to document real projects, design decisions, test results, build logs, ...
Sometimes a software problem is not really a software problem. This story started with Steam crashing on my CachyOS installation. Or, more precisely, Steam itself appeared to work, but several ste...
Waiting game is over. The package from JLCPB arrived and I’m happy as a clam! Colors are as they supposed to be (well, it’s green…), mask is legible - QR can be easily scanned, 0805 parts are nicel...
With the schematic fully locked down and validated, it was time to move from the abstract world of logical connections into the physical reality of copper, fiberglass, and solder paste. The goal f...
A few days ago I saw a simple pcb on my colleagues (L.Ch.) desk. A simple electronic toy, a dice with LEDs. It got me thinking “Can I do something like this? It shouldn’t be that hard” and would be...
Yesterday I couldn’t stop thinking how to move forward with ESP32C3 and especially that the test case #4 from my last post was kinda sorta not enough (built in a rush with a hot needle). I knew I c...
Where Part 4 Left Off In Part 4, Zdenduino went through another useful shakedown round: PWM fade, ADC reading, BLE scanning, and BLE LED control. That was a nice mix of analog-ish behavior, wirel...
Where Part 3 Left Off In Part 3, Zdenduino finally got online. The board connected to Wi-Fi, served a tiny web page, and controlled an LED from the browser. That was a big step, because it change...
From Blinking Pins to a Real Dev Board In Part 2, Zdenduino finally crossed the most important line: It worked. USB upload worked. GPIO worked. The board did not immediately become a very small ...
The Boards Have Arrived! The PCBs finally arrived from JLCPCB and boy oh boy… they are beautiful. I was a little worried that the tiny labels around the GPIO headers (J2 and J3) would end up un...