arturo182Dec 28, 2022
If you have a project you've done this year that you're particularly proud of, post it here (photos, links, whatever you want). We'll end up with replies full of awesome projects!
Show threadAxel 🚴😷🐧🐪⌨ | #WeAreNatenom

@arturo182: A rather simple project, but I love the outcome: A #RaspberryPiZero based, continuous #CO2 "Traffic Light" as an indicator when the windows need to be opened for some fresh air, especially more #oxygen: https://github.com/xtaran/co2-led-meter

It requires no soldering, just plug a bunch of components together (should all be available at https://shop.pimoroni.com/) and run a short #Python script.

Motivation was Sensirion's USB CO₂ traffic light where the IMHO rather high thresholds can't be changed.

GitHub - xtaran/co2-led-meter: Simple CO₂ LED Meter

Simple CO₂ LED Meter. Contribute to xtaran/co2-led-meter development by creating an account on GitHub.

GitHub
Dec 28, 2022 at 11:17pmWeb
Show threadVox PopuliDec 29, 2022
@xtaran @arturo182 What a fantastic project! It can also help you (indirectly) determine how well your #CorsiRosenthalBox is helping you #FilterYourAir
Show threadAxel 🚴😷🐧🐪⌨ | #WeAreNatenomDec 29, 2022

@vox_n_thecosmos: Well, I have an off-the-shelf air filter/purifier in my computer/office room at home, but I never noticed relations between to CO₂ level and the filter's activity.

I though noticed relations of the CO₂ level with the number of persons in the room, opening the windows, cooking with gas (in a different room in the same flat), etc.

Cc @arturo182

Show threadFritzDec 29, 2022
@xtaran @arturo182 Since the sensor also tracks temperature and humidity, I’m going to try to build one with a display. This is a great project, thank you for sharing!
Show threadAxel 🚴😷🐧🐪⌨ | #WeAreNatenomDec 29, 2022

@fritzt: Actually I had something similar on my mind (using a LED matrix to display the PPM value), too, but never went that far as it seemed to extend complexity quite a bit. There are some #BreakoutGarden compatible LED matrix breakouts like e.g. https://shop.pimoroni.com/products/11x7-led-matrix-breakout (that's the one I planned to use) or https://shop.pimoroni.com/products/led-dot-matrix-breakout

Please also note that most Breakout Garden compatible displays need the #SPI variant of the Breakout Garden HATs while I used the #I2C-only variant.

Cc @arturo182

11x7 LED Matrix Breakout

Show threadFritzDec 29, 2022
@xtaran @arturo182 Yeah I see you were going for simplicity, and the result is clean and efficient. It’s my nature to complicate things…
Show threadalanszlosekDec 29, 2022
@xtaran @arturo182 Love this! I did something similar with the Huzzah esp board and CO2 sensor from adafruit. Mine sends metrics to InfluxDB, graphed with Grafana