2 layers50 × 50 mm
Boards using the SCD40-D-R2
30 boardsBoards in 28 GitHub repositories, designed in KiCad, that use the SCD40-D-R2 by Sensirion (-10℃~+60℃ 10.1mm 10.1mm 15mA 2.4V~5.5V 400ppm~2000ppm 6.5mm Air quality I2C Reset function ±5% LGA-20(10.1x10.1) Gas Sensors ROHS). See how each wires it, with its parts, size, README and files; the SCD40-D-R2’s symbol, footprint and pinout are on its own page.
- 4 layers13.6 × 19.4 mm
- 4 layers100 × 75 mm
OpenAirScope
emertcakir/OpenAirScope
Open-source air quality and environmental monitoring node with STM32H743 + ESP32-C3, LoRaWAN, RS485, USB-C, Li-ion charging, and multi-sensor support.
282 parts26MIT - 2 layers10.3 × 17 mm
Watchy scd40
cscott/watchy-co2-pcb
Simple PCB to mount the Sensirion SCD40 CO2 sensor next to Watchy
12 parts13 - 2 layers42.4 × 94 mm
- 2 layers106 × 58.5 mm
CO2 Monitor SMD
romkey/pdxhackerspace-portable-co2-monitor
Open source hardware and software portable CO2/air quality monitor
28 parts3MIT - 2 layers95.3 × 34 mm
GasSensor
Daniel-Abdi/Matter-CO2-AirQuality-Sensor
Create an ESP32-C6 based air quality sensor for Matter. Grab CO2 concentration in real time and update in any Matter compatible app.
22 parts2 - 4 layers19.8 × 50.9 mm
Zigbee air quality monitor
nobodyguy/zigbee_air_quality_monitor_hardware
Opensource HA compatible air quality monitor with CO2, temperature and humidity measurements
35 parts2Apache-2.0 - 2 layers63.5 × 78.7 mm
Monitor PCB
AkilaA25/Spoilage-Monitor_PCB
Battery-powered PCB that detects food spoilage in a fridge using a BME680 (VOC/humidity) and SCD40 (CO₂) sensor pair, an MSP430FR2355 MCU, and an IoT module header for phone connectivity.
60 parts1 - 2 layers99 × 88 mm
- 2 layers55 × 40 mm
Hass Room Sensor
Hass-Room-Sensor/Hass-Room-Sensor
Home Assistant compatible sensor platform allowing to connect with ZigBee and ESPHome support.
31 parts1MIT - 4 layers130 × 105 mm
HomeDeck
Kilan777/HomeDeck
Jarvis HomeDeck: a Raspberry Pi CM4 carrier board and voice-assistant software for a 7-inch smart display (KiCad hardware, generated from Python, plus the Python/JS assistant)
228 parts1 - 4 layers96 × 81 mm
- 2 layers26 × 45.1 mm
CustomCard
aleighwood/FrameworkExpansionCard
This framework expansion card measures ambient C02 concentration, temperature and humidity. It can be used on any computer with a USBC port.
15 parts - 2 layers82 × 50 mm
ESP S3 MONITOR V 1 2
electromotif208/pcb-portfolio
👨💻 Electronics Engineer 📺 YouTube: ELECTROMOTIF 🔧 Tools: KiCad, EasyEDA 📡 Domains: Power Supply, ESP32, IoT, Embedded Hardware
90 parts - 2 layers60 × 40 mm
Gas sensor breakout
ginomcfino/gas-sensor-breakout
PIC16F18344 gas-sensor board with CO2, oxygen, and air-quality sensing, protected power input, programming, and expansion interfaces. Designed in KiCad.
33 parts - 2 layers
Air quality monitor
hashier/air-quality-monitor
Custom PCB design (KiCad) for the air quality monitor. Planned.
8 parts - 2 layers50.6 × 62.2 mm
Air ghost
HeyPCB/air-ghost
Air Ghost: A little ghost that blushes red when your room needs fresh air. KiCad 10, heypcb.ai merch.
19 partsCERN-OHL-S-2.0 - 2 layers38.1 × 38.1 mm
Sensor eval brd
kira-the-engineer/OS-Air-Quality-Sensor
Repo that stores open source firmware/hardware for monitoring indoor and outdoor air quality using an SCD-40 sensor.
14 parts - 4 layers72.9 × 62.9 mm
IEQ Monitor
lalithk06/PCB_Designs
This repository contains various PCB design projects made using KiCad
88 parts - 2 layers75.5 × 59 mm
Weather station
mantisea12/esp32_weather_station
An ESP32-based weather station using BME680, DHT11, and SCD40 sensors to monitor temperature, humidity, pressure, air quality, and CO₂ concentration
36 parts - 4 layers55.6 × 104.6 mm
- 2 layers100 × 36.7 mm
Dash
object1037/dash
Environment monitor (Temperature, Relative humidity, CO2) with e-paper display.
28 parts - 4 layers68.4 × 33.3 mm
Adapter board r2
picafe/bicolor-matrix-v2
A 32x8 bicolor LED matrix module composed of 4 8x8 matrices based on the Holtek HT16K33A I2C LED driver. V1 paired it with a stacked adapter (RP2040 Zero + DS3231 module); V2 redesigns the matrix routing and puts an…
54 parts