My own project to creation simplest of possible the economy timer, called by me AITimer. In development was used SDCC and PICPgm, MCU PIC12F629, some old recycled parts and various junk. Now the prototype is in a natural test in my apartment. You can see functionality explanation on Youtube: https://youtu.be/qxqCYNnys9E

Is had designed schematics, PCB and manually assembled low noise power supply and impedanse matching environment of the Plessey EPIC sensor with consider to strong constrains and recommendations from manufacturer.

Arduino Pro Micro based project. Is had designed schematics, software and manually assembled prototype of SMS notification system by SIM800L DCE and four PIR sensors with backup battery and ESD protection.

Arduino Nano based project. Is had designed schematics, software and manual assembled prototype of the original watch with screen color setting and power backup battery.

Team participation what called SNOB. I had designed schematics and software for power converter and control automatics of the street light by solar powering. Digital loopback Buck-Boost MPPT 250W 220kHz with STM32F334.

This photo created by me in 1984 year, in student research of causes of crash ICS. In the photo you can see the place of thermal breakdown of transistor structure (аt the bottom of the picture).