BoardRepo electronics project sharing

KiCad and hardware projects using relay

Open relay hardware projects on BoardRepo, the GitHub for hardware. View the schematic, PCB, and BOM in your browser and download the KiCad sources, BOM, and Gerbers.

Projects

36 boards
reference-hardware
@pionixpublic

BelayBox reference hardware

schematicpcbbomresistorcapacitorfusecrystal
CERN-OHL-P-2.000Jul 2, 2026
project-caribou
@arrow-air

Project Caribou documentation, designs, and project artifacts.

schematicpcbbomresistorfusecapacitorIC
No license00Jul 2, 2026
k_aries
@f6itu

Aries, an OpenHPSDR ATU (kicad version)

schematicpcbbomresistorcapacitordiodeIC
No license00Jul 2, 2026
newsky
@kuku-199

<<<<<<< HEAD NewSky📺 中文版本

schematicpcbbomresistorcapacitorinductorcrystal
Apache-2.000Jul 2, 2026
environmental-sensor
@kwartzlab

The source for the environmental sensors used at Kwartzlab

schematicpcbbomcapacitorresistordiodeconnector
No license00Jul 2, 2026
lc-rfe
@myriadrf

LibreCellular RF Front-End Hardware Design

schematicpcbbomresistorfuseinductorcapacitor
No license00Jul 2, 2026
autobloomer-sensormodules
@plb500

Code and PCB designs for AutoBloomer MQTT sensor modules

schematicpcbbomcapacitorresistorICbattery
No license00Jul 2, 2026
iot12
@atoomnetmarc

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

schematicpcbbomresistorcapacitorESP32inductor
Apache-2.000Jul 2, 2026
esp32-zigbee-light-mini
@david-eipi

Compact version of the zigbee remote light control using ESP32-H2 and Home Assistant integration

schematicpcbbomcapacitorresistordiodeconnector
BSD-2-Clause00Jun 28, 2026
hardware
@plantalytix

No description.

schematicpcbbomcapacitorresistordiodeinductor
No license00Jun 28, 2026
iot_device
@circool

No description.

schematicpcbbomresistorcapacitorconnectorIC
MIT00Jun 28, 2026
soldered-inkplate-4-tempera-with-glass-panel-hardware-design
@solderedelectronics

No description.

schematicpcbbomdioderesistorcapacitorfuse
No license00Jun 28, 2026
air-quality-sensor-mq135-breakout-with-easyc-hardware-design
@solderedelectronics

Hardware design, BOM, gerbers and 3D files for Air-quality-sensor-MQ135-breakout-with-easyC designed by Soldered Electronics.

schematicpcbbomcapacitorresistorICinductor
No license00Jun 28, 2026
k_relay_board
@f6itu

LA2NI's OpenHPSDR 4 ways HF relay board (Kicad Version)

schematicpcbbomcapacitorresistorantennadiode
No license00Jun 28, 2026
kicad-ant_switch
@s59mz

HF Antenna Switch

schematicpcbbomcapacitordiodeconnectorrelay
GPL-3.000Jun 28, 2026
antennaswitchcontrol
@n1kdo

IOT Antenna Switch Control

schematicpcbbomresistordiodecapacitortransistor
CC-BY-SA-4.000Jun 28, 2026
4-channel-wireless-rf-rca-system
@satuapuuniversity-source

A professional 4-channel RF RCA switching system with specialized RX (114.475mm x 72.575mm) and TX (71.475mm x 70.575mm) units. Features Omron G5V-1 relays, Right-Angle RCA jacks, and MCP1640 boost converters for stable 5V operation from AA batteries. Designed in KiCad v10.0 with optimized bottom-layer component placement

schematicpcbbomcapacitorresistordiodetransistor
No license00Jun 28, 2026
esp-ev-switch
@valletw

ESP32 EVSE Controller

schematicpcbbomresistorcapacitordiodepotentiometer
MIT00Jun 28, 2026
bsc_hw
@shining-man

Hardware battery safety controller (BSC)

schematicpcbbomresistorcapacitorICdiode
MIT00Jun 28, 2026
esp32-multi-motor-controller-board-
@mritunjay5511

Custom ESP32-WROOM-32 robotics controller PCB with onboard buck/LDO power regulation, auto-program circuit, and BTS7960/RMCS/relay/servo interfaces. Designed in KiCad.

schematicpcbbomcapacitorresistordiodeinductor
MIT00Jun 28, 2026
home-automation-kicad-work-in-progress
@kehindejanetolaniyi23

Work-in-progress KiCad PCB design for a home automation relay and power monitoring board, including schematic review, PCB layout review, and DRC improvement notes.

schematicpcbbomdiodecapacitorconnectorfuse
No license00Jun 28, 2026
stm32-rtc-climate-controller
@stevel1212-droid

Kicad project of an STM32-based board climate controller utilizing an RTC module for time-scheduled environmental reading of temperature/humidity with SHT30 sensor and optional small relay for control.

schematicpcbbomresistordiodetransistorIC
MIT00Jun 28, 2026
behin-dpc-project
@hamidsaneie

dry protection circuit

schematicpcbbomresistorcapacitordiodeconnector
No license00Jun 28, 2026
el-load
@fietser28

No description.

schematicpcbbomresistordiodecapacitorconnector
CERN-OHL-W-2.000Jun 28, 2026
angaza_elimu_pcb
@r-mutura

ANGAZA_ELIMU_PCB

schematicpcbbomcapacitorresistorinductorcrystal
No license00Jun 28, 2026
bryan_herrera_electiva_2025_c2
@bbry4nn

No description.

schematicpcbbomresistorcapacitordiodeinductor
No license00Jun 28, 2026
oxikit-brainboard
@shridattdudhat

An Open Source Oxygen Concentrator Brain Board for Oxikit with Particle or ESP32 board !

schematicpcbbomcapacitorresistordiodeconnector
GPL-3.000Jun 28, 2026
esp-atx-power
@valletw

ESP32 ATX Power Controller

schematicpcbbomresistorcapacitorregulatorconnector
MIT00Jun 28, 2026
esp32_mini_8port_wled
@w4b-zero

PCB and KiCad-Files for a 8Port WLED ESP32_mini Board

schematicpcbbomdiodetransistorcapacitorconnector
GPL-3.000Jun 28, 2026
dual-button-doorbell
@espena

ESP32 driven, WiFi-enabled dual-button doorbell with custom audio signals and real-time red/green indicators.

schematicpcbbomresistorcapacitorfuseIC
GPL-3.000Jun 28, 2026
rkd-old
@ptalts-lk

一个基于RP2040+CH9329的4k音游控制器/可编程键盘 支持扩展 硬件宏 SDVX v1.1版本正在开发中

schematicpcbbomresistorcapacitorregulatorIC
GPL-3.000Jun 28, 2026
e05
@rorchive

Analog DC Motor Driver (BC547 + 5V Relay). Hardware project designed in KiCad for Inatel's E05 analog electronics class.

schematicpcbbomresistordiodetransistorconnector
CERN-OHL-W-2.000Jun 28, 2026
dw3005t
@dominik-workshop

Linear power supply, with digital control

schematicpcbbomresistorcapacitortransistordiode
GPL-3.000Jun 28, 2026
openairscope
@emertcakir

Open-source air quality and environmental monitoring node with STM32H743 + ESP32-C3, LoRaWAN, RS485, USB-C, Li-ion charging, and multi-sensor support.

schematicpcbbomresistorcapacitorswitchdiode
MIT00Jun 28, 2026
ulticore-v1-plc
@paulmartinezcuenta

Custom industrial-grade PLC and logic controller engineered around the ESP32 platform.

schematicpcbbomresistorcapacitordiodetransistor
MIT00Jun 28, 2026
ossi
@transistorgrab

Open Source Solar Inverter - Software, Hardware, Mechanics

schematicpcbbomresistorcapacitorcrystalinductor
MIT00May 8, 2026

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