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activedifferentialprobe

A RF Differential Probe based on the 2SC3356 transistor

activerfprobe

An active RF probe based on the 2SC3356 transistor available from many sources.

apple2card

Apple II Peripheral Card that Interfaces to a ATMEGA328P for SD card storage

apple2shield

An Apple ][ bus card that allows an Arduino and/or a Shield to be connected to the Apple ][ bus.

arduino_stm32

Arduino STM32. Hardware files to support STM32 boards, on Arduino IDE 1.8.x including LeafLabs Maple and other generic STM32F103 boards

arduinostm32_tvout

Arduino STM32 TVoutライブラリ

audiomapperusb

cga2scart

A PCB for a CGA To SCART adapter

drsstc-pcb-pack

A pack of PCBs for a dual resonant solid state tesla coil setup. Pretty much everything you need.

erc721

The reference implementation of the ERC-721 non-fungible token standard.

fldigi

fldigi repository with SCAMP

flexiblecharger

An Arduino-controlled charger for different kinds of batteries, or it can be a standalone power supply

freecadparametricmodels

A bunch of useful FreeCAD parametric models I've designed

guitarpico

A guitar effects processor based on the Raspberry Pi Pico

hidpanel

A customizable HID USB device with buttons, encoders, sliders, potentiometers, etc.

highvoltageopamp

A discrete high voltage op amp that uses 5551/5401

ip65

IP65 - a TCP/IP stack for 6502 based computers (added Dan ][ card support)

isacard

A ISA card for PC/XT/AT that has SD storage and SPI/I2C interfaces using a ATMEGA328P

kicad-website

This is the official website source for KiCad at

ledpanel

A panel for illuminating a decorating display from below with options for size and layout

linearps

Linear constant constant/current constant voltage power supply PCB

littledx

A super simple, super cheap all-mode QRP transceiver

mctheremin

Microcontroller based theremin using the STM32F103C8T6 bluepill board

modulartuner

A Modular Antenna Tuner for a Phased Array Antenna System

nanodip

A PCB with the Arduino Nano pinout but uses the ATMEGA328P

niftyrobot

A Raspberry Pi/Arduino based robot with ultrasonic, infrared, other sensors

nixieclock

A Nixie clock that uses IN-14 tubes and very generic components that can be easily sourced.

onechipterminal

A single chip VT100 terminal based on the STM32F103C8T6/CS32F103C8T6

paranoiabox

A standalone elliptic curve/AES file encryption and decryption device

persistencedisplay

A 3-D persistence display