About the article

In-vehicle CO2 Meter

Safe(r) behind the wheel

In-vehicle CO2 Meter
CO2 itself is not really that dangerous, but it can lead to poor concentration relatively quickly. Under certain circumstances dangerous situations may arise from this, for example while driving a closed vehicle. To warn you of this a fast responding CO2 meter was developed specifically for in-vehicle use.
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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.

Extra info / Update


- 12 V operation (via cigarette lighter socket)
- Instantly ready for use
- Warns with indicator LEDs when CO2 concentration is too high
- Suitable for measurements of up to 3000 ppm of CO2


ZG01C specifications

- Measuring range : 0–3000 ppm / 0.3%

- Temperature range : 0–50 °C

- Humidity range : 0–95%

- Warming-up time CO2 : <60 s

- Measuring interval : 7 s

- Accuracy : ±50 ppm or 5% of the measured value

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
R1,R2,R3 = 270Ohm
R4 = 68Ohm
R5 = 10kOhm
P1 = 10kOhm
C1,C3 = 100nF
C2 = 100µF 25V
C3 = 10µF 25V
D1 = LED, 5mm green
D2 = LED, 5mm, amber
D3 = LED, 5mm, red
D4 = 1N4007
IC1 = Atmega88-20pu, programmed
IC2 = 7806
IC3 = LP2950-03
K1 = 14-pin pinheader (14mm lead length)
K2 = 4-way header
4-way socket for K2
K3 = 6-pin (2x3) pinheader
K4 = DC adapter socket, PCB mount
LCD type PC0802LRS-AWA-B-Q
IR module type ZG01
Hookup wire
PCB # 100020-1
Kit of parts, including sensor and LCD, Elektor order code 100020-71
Enclosure, Elektor order code 100020-72

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