Hardware

12 posts in this category.

April 22, 2026

PS2 to USB

Build a PS/2 keyboard to USB HID adapter around a SparkFun Pro Micro: PCB, firmware, KVM-friendly HID-only mode, and safe-mode flashing.

July 13, 2024

ESP8266-based PID temperature controller with MQTT connectivity for IoT heating and cooling applications.

June 30, 2024

Hardware and firmware for a fun DIY audio synthesizer toy with multiple sound generation modes.

June 15, 2024

Complete network diagnostic and UPnP SOAP control documentation for 2007-era Pioneer receivers.

May 13, 2024

Adapter for using PS/2 keyboards with Commodore Amiga computers, bringing modern keyboard comfort to classic hardware.

May 12, 2024

KiCad project and firmware for a PS/2 mouse to Amiga adapter, bringing modern mouse support to classic Commodore Amiga computers.

May 8, 2024

KiCad project for a personal high-fidelity audio amplifier with complete schematic and PCB design.

April 10, 2024

ESP8266-based weather station with temperature, humidity, and lightning detection, capable of MQTT Wi-Fi and LoRa transmission.

April 5, 2024

Minimal PWM fan controller for adjustable cooling in electronic projects and enclosures.

March 25, 2024

Raspberry Pi Pico firmware for converting EGA/CGA TTL video signals to VGA, with resistor DAC output and mode switching buttons.

February 20, 2024

Building a daughterboard with GAL and 74LS74 to run the Commodore 128's Z80 processor at dot clock frequency, effectively doubling CP/M performance.

November 10, 2023

KiCad plugin fork that exports PCB data as JSON for React applications, with optional LZ compression and base64 encoding.