REFERENCE DESIGNS

Open hardware, with the files to prove it.

362 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

362

With a design page

362

KiCad projects

163

Easyduino

by Hanqaqa

Easily dive into different PCB KiCad designs of the most popular microcontroller devboards

745 36CERN-OHL-P-2.0

HASwitchPlate board, published by aderusha

KiCad source

IoT & home automation

HASwitchPlate

by aderusha

LCD touchscreen for Home Automation

738 129MIT

RetroWiFiModem board, published by mecparts

KiCad source

Retro computing

RetroWiFiModem

by mecparts

An ESP8266 based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators

254 43GPL-3.0

KiCad source

Sensors & data acquisition

Sensorboard

by z2amiller

Sensor board using ESP8266

200 10MIT

ESP32 kiCAD Footprints board, published by adamjvr

KiCad source

Microcontroller boards

ESP32 kiCAD Footprints

by adamjvr

Footprints for the Espressif ESP32 WiFi/BLE Chip and ESP3212 module, for KiCAD EDA

198 37No license

KiCad source

Microcontroller boards

TheTick

by jkramarz

The Tick is the next evolution in covert access control system implants for simulating adversary-in-the-middle attacks.

183 18GPL-3.0

Project Hydra Meshtastic Pcb board, published by Hydra-Designs

KiCad source

RF & wireless

Project Hydra Meshtastic Pcb

by Hydra-Designs

A minimalist 1W LoRA PCB design for Meshtastic-device firmware

166 22GPL-3.0

kylemanna Sniffer board, published by kylemanna

KiCad source

IoT & home automation

kylemanna Sniffer

by kylemanna

ESP32 Air Quality Sensor with PMSA003 + BME680 and 1.14" LCD

165 17Custom

Tokay Lite Pcb board, published by maxlab-io

KiCad source

Microcontroller boards

Tokay Lite Pcb

by maxlab-io

Tokay AI Camera - ESP32 camera development board

126 27CERN-OHL-P-2.0

ULP Weather Logger board, published by hamityanik

KiCad source

Sensors & data acquisition

ULP Weather Logger

by hamityanik

Yet another ESP8266 (ESP-03) based ultra low power weather logger with 4 sensors

92 14MIT

KiCad source

Sensors & data acquisition

Wiflier

by cnlohr

ESP8266-based Quadcopter Brain

92 15Custom

KiCad source

Microcontroller boards

ProtoConn

by Pakequis

A prototype board with connectors for electronic testing and development.

70 2CC-BY-SA-4.0

Air Quality Sensor board, published by roepkefeller

KiCad source

IoT & home automation

Air Quality Sensor

by roepkefeller

DIY air quality monitor: ESP32-C3, 4 Sensirion/Bosch sensors, custom 4-layer PCB, ESPHome firmware with Home Assistant integration.

57 2No license

KiCad source

Microcontroller boards

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

ESP WiFiSwitch board, published by biohazardxxx

KiCad source

Displays & LED

ESP WiFiSwitch

by biohazardxxx

WiFi power switch using the ESP8266

55 19GPL-3.0

SolarMeshtasticNode board, published by h0lad

KiCad source

RF & wireless

SolarMeshtasticNode

by h0lad

This is a Meshtastic Solar Node PCB based on the Heltec HT-CT62 and the linear solar charge controller TI BQ25185.

38 2CERN-OHL-S-2.0

KiCad source

Microcontroller boards

Mavbridge

by festlv

Serial MAVLink <> WiFi bridge running on ESP8266

30 14MIT

Gameboy Hifi Audio board, published by cajunpanda

KiCad source

Retro computing

Gameboy Hifi Audio

by cajunpanda

A HiFi audio mod for various Game Boy models

26 3MIT

KiCad source

Microcontroller boards

IoT12

by atoomnetmarc

Schematic, PCB files, firmware and 3d models for creating the IoT12 solder iron temperature controller for T12 compatible tips.

14 5Apache-2.0

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Microcontroller boards73 Keyboards & input devices54 Computers & FPGA30 Retro computing30 Displays & LED23 Audio & music22 Sensors & data acquisition21 Motor control & robotics21 Power & batteries20 RF & wireless20 Interfaces & adapters16 Other boards14 IoT & home automation6 Test & measurement5 Badges & art boards5 Automotive & vehicles1 Cameras & imaging1

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Repository topics

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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