Recent Projects

Cloud-free local control of Mitsubishi split heat pumps: ESP32 talks to the indoor unit's CN105 port and bridges it to MQTT.

MELCloud Replacement – ESP32/MQTT

stefanschnitzer stefan.schnitzer

Electronic bomb simulator designed for Airsoft matches

TM1638+CH32V003 Prop Bomb

A new computer built on my own CPUs, a 65C02/65C816-compatible chip and a RISC-V core, running on FPGAs with HDMI, sound, keyboard and SD.

Ember65: a modern 65xx computer, from the silicon up

jonathan-stein Jonathan Stein

Documenting my path learning embedded systems from scratch including ESP32, Arduino, sensors, and everything in between.

esp32 Hardware Journey

niam-savaliya Niam Savaliya

An RP2350 replaces the undocumented controller in Apple's UniDisk 3.5 and drives the stock Sony 800K mechanism on a drop-in PCB

Disk Hamr: A UniDisk 3.5 controller

robert-rico Robert Rico

compact, energy-efficient, battery-powered system for ePaper-based display of information gathered via Wi-Fi

Tinta - low power wireless epaper device

One SDR receiver. Two hardware platforms. Dozens of decoders. No installation.

OFFgrid-SDR

New cut on an old idea

2026 Mobile Compute Station

curtis-soldano Curtis Soldano

1-bit MCU switch-level simulator, from reverse-engineered die photos -> transistors -> logic gates -> components

MC14500 simulator

Qwen

rhea-rae Rhea Rae

4S LiFePO4 Active Charge-Shuttling Battery Management System

Active Charge-Shuttling BMS

A low-cost SDR receiver. Powered by CH32V467, targeting 1MHz-4GHz, 10-bit ADC, and up to 20MHz bandwidth via USB HS.

SDR32 - A Modern RTL-SDR Alternative

synapse Synapse

A smart CD player + Internet radio + Bluetooth receiver HiFi component based upon the ESP32 microcontroller

ESPer-CDP

akasaka-ryuunosuke Akasaka Ryuunosuke

With carefully controlled DSP, the ESP32 can add subtle warmth while still keeping the effect fully adjustable and bypassable.

ESP32 Tube Sound Processor – Warm Analog Sound

mircemk mircemk

Building bio inspired realistic looking humanoid robots to do chores and sports and stuff.

My Advanced Realistic Humanoid Robots Project

An open-hardware NEMA 11 positioning stage with printed 1:1 gears, an M3 screw, editable CAD and optical measurements.

3D-Printed Microscope Stage: Motion Measured

ali-azadbakht Ali Azadbakht