Write to Z80 memory without any special feature on board or firmware

Reverse enginnering of 6 layers PCB

BenchVolt PD is an open-source, USB Power Delivery-based bench power supply capable of delivering up to 100 W through multiple DC-DC converters and LDO channels. It provides adjustable and programmable outputs(waveform capable), current monitoring, and real-time voltage/current display — all powered directly from a USB-C PD adapter.

The development board uses the RP2040 microcontroller, you can order your own pcb as well as components to solder yourself.

This is a complete PCB project for battery charging, a professional PCB design mod with all the files needed for manufacturing and assembly. The circuit is designed to charge batteries efficiently and reliably, and is suitable for use in portable systems, DIY projects, and learning electronics.

One of my first PCB reverse-engineering projects.The board is two-layer, with components soldered only on the TOP side.There are no components soldered on the BOT side.

I was part of a team that built an automated marble sorting and lifting machine with three unique mechanisms. My specific role was to architect and execute the entire electronic nervous system. I solo-designed and fabricated a custom PCB that integrated dual microcontrollers, motor drivers, Bluetooth, and robust power regulation. My parallel-circuit design guaranteed no single component failure could take down the whole system. I delivered a professional, reliable control hub that brought our team's mechanical designs to life

The Linear Keyboard provides the amazing feel of a full mechanical keyboard and allows you to take its small form factor on the go!

The project is an electronic board for operating an LED array. This is a complete PCB project for managing an LED array, including a professional printed circuit board design with all the files required for manufacturing, assembly, and documentation. The circuit allows for arranging and operating multiple LEDs, and is suitable for use in display systems, smart lighting, educational, and DIY projects.

Headphone amplifier published in “Transistor Gijutsu” magazine