
54
The Beetles PCB ART
It's a PCB art board. It’s a music player. It's something else entirely. Hard to define.

50
12V battery charger
LM317 is in the house!
107
SerpenTime
Serpentime is a digital internet clock that transforms into a retro Snake game console at the press of a button

144
Mini USB UPS for Raspberry
This project is the design of a compact USB uninterruptible power supply (UPS), intended primarily to power and keep devices like Raspberry Pi continuously energized during power interruptions. It provides a stable 5 V regulated output with automatic switchover between USB input and battery backup, while maintaining safe battery management and high overall efficiency.

223
Audio amplifier with 1x TDA2030 - 25W
A fairly well-known and interesting circuit.

193
QuasarQ
An ESP32 Powered Space-Themed Interactive Quiz Console

230
Leptosis - 7.5mm PG1316 wireless split keyboard
Leptosis is an ultra flat split bluetooth keyboard. It's thickness will be ~7.5mm, and employs the compact miryoku layout. Using an onboard nrf module, it achieves an ultra long battery life.
256
PiBoy Advance
PiBoy Advance is a modified GBA shell that is retrofitted with a custom PICO 1-based circuit.

462
RP2350 based GPIO expansion card
Framework Expansion Card based on RP2350 providing GPIO to the mainboard (OSHWA UID: IT000024)

248
SolMate
a sleek, solar-powered charger that keeps your devices energized wherever you roam

236
Near-Field Probe with Integrated LNA
This project implements an active near-field probe with an integrated Low Noise Amplifier (LNA) for electromagnetic compatibility (EMC) diagnostics. It is designed to improve sensitivity when measuring low-level emissions from circuits under test, enabling effective near-field scanning in the DC to 1.1 GHz range.

311
RP2050 based Single-Pair -Ethernet PCB
The project using Raspberry Pi RP2050 series of SoC with Single Pair Ethernet chip

745
High-Performance Synchronous Buck Converter Module
This project is the design of a DC-DC buck regulator module based on the AP64501. It is mechanically and electrically compatible with the popular LM2596-based low-cost Chinese modules.

180
Small ARM dev board based on ATSAMD10
This repository takes a step-by-step look at creating a simple ATSAMD10-based dev-board using KiCAD.

595
nanoSense:Motion - Ultra Low Power Wireless Motion
Motion & Human Presence Sensing with Ultra Low Power Consumption and Bluetooth Low Energy Connectivity

349
USB 3.x Type-C Switch
The goal of the project was to design a KVM style USB 3.x Type-C Switch.

267
CoolSWITCH - Wireless High Power Smart Switch
Designed for Industry 4.0, but suitable for smart home too. Features WiFi control, current measuring, PWM, soft start / stop and safety.

195
Portable Studio Light
Studio Light Mini lets you pick colors and control RGB lights easily through a web app. Just tap, set, and glow.

297
Mini UPS 12V Lead-Acid
This project implements a mini uninterruptible power supply (UPS) designed for 12V Lead-Acid AGM/GEL batteries.

704
ESP32S3 DEV Minimal LowPower
This project implements a minimal low-power development board based on the ESP32-S3.