martijnvwezel/pico-probe-programmer
The simple pico can be used to program other devices. Raspberry pi made such an effort. However there is no board yet, that is open-source and can be used with OpenOCD as a general-purpose programmer
AkBKukU/GreaseweazleExternalAdapter
Adapter PCB to easily use external floppy drives with a greaseweazle
emertcakir/OpenAirScope
Open-source air quality and environmental monitoring node with STM32H743 + ESP32-C3, LoRaWAN, RS485, USB-C, Li-ion charging, and multi-sensor support.
m-kozlowski/airbridge
Wireless adapter for AirSense/AirCurve 10 devices
alvaroalea/plusD-clone
Schematic of a clone of the Disk Interface +D for the ZX Spectrum
johnwinans/2057-ICE40HX4K-TQ144-breakout
Minimal Raspberry PI breakout board for ICE40HX4K FPGA
pce-devel/PCE_FRAM_adapter
Adapter for easily replacing your PC Engine's backup memory with non-volatile FeRAM
stuartpittaway/WebastoWBUSInterface
Hardware circuit diagram for interfacing to the Webasto WBUS interface from a PC/Arduino
ThorstenBr/A2USB
This projects provides alternate firmware for A2VGA cards to add USB support to the Apple II. It currently supports a USB mouse and fully emulates an Apple II Mouse Interface Card.
Bastardkb/Charybdis-EC11
EC11 PCB to be used in place of the trackball in the Charybdis keyboard.
XboxDev/ogx-usb-adapter
Original Xbox front controller port USB adapter PCB
crossplatformdev/uConsole-Universal-Expansion-Board
Breakout board for designing ClockWorkPi uConsole expansion boards
jyancat/UART-Expansion-Card
Design files for the UART expansion card, please note this is a tested and working expansion card. Licensed under CERN-OHL-S-2.0. Uses the CH340C with switchable power and logic levels (5V and 3V3)