REFERENCE DESIGNS

Open hardware, with the files to prove it.

87 published boards whose schematic and layout source is public — KiCad, EAGLE, Altium and EasyEDA projects you can read, fork and build on. Every entry links to the original repository and names its licence.

Boards indexed

With a design page

KiCad projects

Sirboard

by vul-os

Open hardware: 107 KiCad PCB designs — SMD-to-THT breakout adapters, ATTiny/ATMega/ESP development boards, and a 39-part sensor line on a common JST-SH connector.

55 17Apache-2.0

Browse by category

Microcontroller boards22 Keyboards & input devices17 Computers & FPGA13 Retro computing6 Power & batteries5 Motor control & robotics5 Sensors & data acquisition4 RF & wireless4 Audio & music4 IoT & home automation2 Interfaces & adapters2 Other boards2 Badges & art boards1

Browse board families

ESP32ESP32 PCB design ArduinoArduino PCB design Raspberry Pi / RP2040Raspberry Pi PCB STM32STM32 PCB design Keyboard PCBkeyboard PCB design Power supplypower supply PCB design Battery chargerbattery charger PCB Motor controllermotor controller PCB Audio amplifieraudio amplifier PCB USB-CUSB-C PCB layout FPGAFPGA board design LoRaLoRa PCB design Dronedrone PCB design

Repository topics

pcb 29 kicad 19 keyboard 16 electronics 11 arduino 11 diy 11 esp32 11 fpga 6 hardware 5 3d-printing 5 ergonomic-keyboard 4 embedded 4

Every project listed here belongs to its author and is linked to its original repository. Licences are read from the repository metadata and summarised for convenience — check the licence file in the project itself before you manufacture or redistribute a design. ProtoFlow does not host, mirror or verify these files. Index last rebuilt 2026-09-21.

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