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Air Pollution Monitor

Any smokers hiding in the toilet?

Air Pollution Monitor
The quality of the air we breathe should be of deep concern to all of us. We all know that airborne dust particles keep asthma sufferers awake at night, but the levels of certain gasses are equally important. This project measures the level of air contaminant gasses, and sounds an alarm when their concentration exceeds a certain level, for instance when someone lights a cigarette…
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
Component list

Component List


R1,R2 = 10kΩ

R3,R4 = 1kΩ

R5,R6,R7 = 220Ω


C1 = 100nF


D1 = BAT85

IC1 = TGS2600

LED1,LED2,LED3 = red, 3mm diam.

T1 = BS170


BUZ1 = PS1420P02CT

K1,K2 = 17-way pinheader socket, 0.1" pitch (for ESP32 Pico Kit)

S1 = tactile-feedback switch, PCB mount, 6x6 mm



PCB # 170182-1 (Elektor Store)

ESP32 Pico Kit (Elektor Store)

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