
Relay Board
Justinorange/PCB-Compilation
A collection of custom PCB designs, prototypes, and lab projects built for research and experimentation.

A collection of custom PCB designs, prototypes, and lab projects built for research and experimentation.
Flashlight is an open-source printed circuit board by Justinorange, from the Justinorange/PCB-Compilation repository on GitHub. It is a 2-layer board of 79.3 × 52.5 mm with 10 parts on 4 nets.
A collection of custom PCB designs, prototypes, and lab projects built for research and experimentation.
A robust relay control and safety management board designed for hardware kill switching, power distribution, and status monitoring.

View the project source and design files on GitHub.
I am building a set of sensor breakout boards that will eventually be combined into a single air quality sensing PCB. These boards are still in progress, and I am finishing the analog sensor boards before moving on to the digital ones.

These breakout boards were made for the Machine Intelligence Laboratory (MIL) and are part of a larger integrated sensing platform. View the breakout designs on GitHub.
The STUSB 4500 controller is one of the more complicated PCBs I have made, largely due to the use of USB C protocols and having to solder it by hand.

This board was made for FOCUS Lab last year and represents a more complex design in the collection. View the project source on GitHub.
This was a quick and fun project to build two flashlights that produce over 20,000 lumens each while keeping the cost as low as possible. The total cost for both was approximately $50. (I also just wanted to make a single sided aluminum PCB).

View the repository and design files on GitHub.
This repository highlights a diverse range of custom PCB projects, including modular air quality and hydrogen sensor systems, a comprehensive relay control board with hardware safety features, research-focused USB-C power controllers, and high-output lighting builds.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | LED | Diode_SMD:CREE_JU7070B_K | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
It measures 79.3 × 52.5 mm and has 2 copper layers, 1.6 mm thick.
10 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
From the Justinorange/PCB-Compilation repository on GitHub, at the commit this page was made from: the board is Flashlight/Flashlight.kicad_pcb and its schematic Flashlight/Flashlight.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask Justinorange before reusing the design.

Justinorange/PCB-Compilation
A collection of custom PCB designs, prototypes, and lab projects built for research and experimentation.

Justinorange/PCB-Compilation
A collection of custom PCB designs, prototypes, and lab projects built for research and experimentation.

gusmanb/logicanalyzer
24 channel, 100Msps logic analyzer hardware and software

byrantech/laptop
anyon_e, a highly integrated, high end, open source laptop. Attempt the impossible.

joeycastillo/Sensor-Watch
A board replacement for the classic Casio F-91W wristwatch


OLIMEX/OLINUXINO
OLINUXINO is Open Source / Open Hardware, low cost from EUR 24 Linux Industrial grade Single Board Computer capable to operate -25+85C

rusefi/rusefi
rusefi - GPL internal combustion engine control unit

VoronDesign/Voron-Hardware
Cool Hardware designed by the Voron Design group

hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI