Hacker News Reader

A similar project can be done without soldering using parts from Adafruit, including a module for the Sensiron chip. Here is a project I made using Adafruit's e-ink module and the SCD41 module they sell: https://www.printables.com/model/121265-salud-co2-monitor

View on HN

I need to add price details to my blog post. The main goal of mine was low cost. The total cost for me to produce each board is $17 where $14 of that is the SCD40 sensor.

That's impressive! Mine was over $100. The SCD40 in module format is $45.

You can get SCD40s on AliExpress for under USD 15. I bought a few and around 20% did not work and some had some weird data patterns occasionaly.

Reply on news.ycombinator.com