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AUSTRALIA • + Follow

Brandie Lee

UNITED STATES OF AMERICA
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NIGERIA
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Tools, APP Software Used etc.

	KiCad 8.0 KiCad
	FreeCad
	Soldering iron (generic)
	Bambu Lab X1-Carbon 3D Printer Bambu Lab

Description

Desktop Indoor Air Quality Sensor

In summary, the Desktop IAQ is a USB-C powered indoor air quality monitor built on an STM32G030 that reads from three sensors (Senseair S8 for CO2, AGS02MA for VOCs, and Renesas RRH62000 for particulate matter + humidity/temp), then displays results on a 36-LED multiplexed array (9 rows × 4 columns — one column per parameter) plus RGB status LEDs.

The LED arrays have 4 LED colours, 3xgreen, 3xorange, 2xred and a single blue LED. The idea behind this LED arrangement was to allow for a simple to understand gauge. If the reading is green you are all good, if its red or blue then it might be worth opening (or maybe closing) a window.

Code

I used the ST Cube IDE, I have uploaded the whole folder

IAQ_Take2.zip

Schematic and Layout

Full KiCad Project with Schematic pdf

IAQ_KiCad_Project_V2.zip

CAD-Custom parts and enclosures

All mechanical files needed, can export step or stl etc from FreeCad

FreeCad_Mechanical.zip

Download Gerbers Download BOM(Bill of materials)

Apr 28,2026

412 views

Desktop Indoor Air Quality Sensor

Quality sensors with fun LED bar graphs for easy indoor air quality evaluation.

412

Published: Apr 28,2026

Standard PCB

Download Gerber file 4

BOM(Bill of materials)

Centroid file

PCBWay Donate 10% cost To Author

Only PCB

PCB+Assembly

Add to cart

Project images are for reference only. Actual production is based on the manufacturing files on the project page. Please review the designer's notes (e.g., PCB thickness) and select the appropriate options. PCBWay is not responsible for issues caused by unsuitable parameter selections.
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