REFERENCE DESIGNS

Open hardware, with the files to prove it.

387 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

387

With a design page

387

KiCad projects

175

OURS Project

by evanman83

Step-by-step instructions to build a smartphone that is open-source, upgradeable, repairable, and Big Tech free.

901 57GPL-3.0

KiCad source

RF & wireless

OpenRX

by OpenDrone-hw

OpenRX open-source ExpressLRS receiver family hub; board sources live in four dedicated hardware repositories.

411 64Custom

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

RF & wireless

WSPR Beacon

by IgrikXD

A compact hardware device for transmitting WSPR messages based on the SI5351 clock generator, using GPS for transmission timing synchronization and automatic QTH locator calculation.

125 12GPL-3.0

EAGLE source

RF & wireless

key20

by duerrfk

Key 2.0 is a Bluetooth IoT Door Lock. It turns a conventional electric door lock into a smart door lock that can be opened using a smartphone without the need for a physical key. Thus, Key20 is the modern version of a physical key, or, as the name suggests, the key version 2.0 for the Internet of Things (IoT) era.

90 34Custom

RF & wireless

Heard

by luciobaiocchi

Offline group-safety mesh for hikers: ESP32 + GPS + LoRa, with a firmware-in-the-loop simulator and 3D replay viewer

89 8Apache-2.0

RF & wireless

Snappergps Pcb

by SnapperGPS

Printed circuit board (PCB) design for snapshot GNSS receiver

46 4Custom

KiCad source

RF & wireless

OpenTheremin V3 Shield

by GaudiLabs

Open Source Theremin Instrument, Shield PCB and Hardware description

45 12GPL-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

RF & wireless

ZigBee SmartMeter Reader

by Tropaion

This is a ZigBee device to collect data from smartmeters using the DLMS/COSEM protocol.

32 4GPL-3.0

E07xESP32C5 board, published by b1scuitdev

EasyEDA source

RF & wireless

E07xESP32C5

by b1scuitdev

E07xESP32C5 is a Sub-GHz & ESP32-C5 module for Flipper Zero. It includes an EBYTE E07-433M20S (PA+LNA), microSD slot, UART pads for GPS, 5V output and a 4-layer PCB with solid ground planes for RF performance.

29 6Custom

Radio Frequency Prototype Boards board, published by maelh

KiCad source

RF & wireless

Radio Frequency Prototype Boards

by maelh

Radio frequency prototype boards (based on MegawattKS' design)

28 5BSD-3-Clause

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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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