Thingiverse

CO2 meter

von aleksandr_ru

9 Downloads

17 Likes

0 Makes

The DIY CO2 meter and grapher for home and office use.

Features:
- display current CO2 level, temperature and humidity
- display historical graph of CO2 level for last 30 minutes
- switch to large display of CO2 level
- alarm when CO2 exceeds limit of 1000 ppm
- self calibration with countdown display

Electronics inside:
- Arduino nano
- 0.96" OLED display
- MQ135 sensor
- DHT11 sensor
- 6x6x4.3mm button

[Arduino firmware and schematics at my github](https://github.com/Aleksandr-ru/co2meter)

Assembly instructions at my website [in Russian](https://aleksandr.ru/blog/domashniy_co2_metr) or [translated to English](https://aleksandr-ru.translate.goog/blog/domashniy_co2_metr?_x_tr_sl=ru&_x_tr_tl=en&_x_tr_hl=ru&_x_tr_pto=wapp).