10 open source boards using the MQ-X
Real designs built with the MQ-X, from public GitHub projects: a quick way to see how others power, decouple and connect it. Each board comes with its KiCad files, full parts list and a render — and you can simulate its firmware on HardLabs.
Air quality sensor-MQ135-breakout hardware design
SolderedElectronics
22 × 38 mm12 parts2LTAPR-OHL-1.07
CO-sensor-MQ7-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.05
Ozone sensor-MQ131-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.03
AVR/ArduinoOzone sensor-MQ131-breakout with easyC-hardware design
22 × 54 mm26 parts2LTAPR-OHL-1.01
AVR/ArduinoCO-sensor-MQ7-breakout with easyC-hardware design
22 × 54 mm26 parts2LTAPR-OHL-1.01
AVR/ArduinoNatural gas--LPG-sensor-MQ5-breakout with easyC-hardware design
22 × 54 mm26 parts2LTAPR-OHL-1.01
AVR/ArduinoBenzene--Toluene--Acetone--Formaldehyde sensor-MQ138-breakout with easyC-hardware design
22 × 54 mm26 parts2LTAPR-OHL-1.01
CO--flammable gasses sensor-MQ9-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.01
Ammonia sensor-MQ137-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.01
Butane--LPG---Smoke sensor-MQ2-breakout hardware design
22 × 38 mm12 parts2LTAPR-OHL-1.01
The MQ-X in open source designs
The gallery holds 10 open source boards using the MQ-X from 10 GitHub repositories; a typical one measures about 22 × 38 mm and carries around 12 components.
100% are two-layer designs, the rest use four layers or more, and 100% carry an open source license.
The most starred is Air quality sensor-MQ135-breakout hardware design by SolderedElectronics.
Parts used alongside the MQ-X
Microcontrollers on boards using the MQ-X
What boards using the MQ-X are built for
MQ-X: common questions
Where can I find a MQ-X reference design?
Each of the 10 boards on this page is a real design using the MQ-X. Open one to see how it is wired up, with the full BOM, a render of the layout and links to its KiCad files.
What parts are used alongside the MQ-X?
The LM393, ATTINY404-SSNR, NMOS-DUAL and TPS613222A appear in the most repositories here.
Which microcontrollers do boards using the MQ-X use?
Most are built on AVR/Arduino (4).
How big is a typical board using the MQ-X?
The median is 22 × 38 mm, and 100% are two-layer designs.
What is the most popular open source board using the MQ-X?
By GitHub stars, Air quality sensor-MQ135-breakout hardware design by SolderedElectronics, with 7 stars.
Can I simulate one of these boards using the MQ-X before building it?
Yes. HardLabs turns a board's netlist and BOM into a working simulation, so you can boot and test firmware against it with no hardware on your desk.