vibration powered electricity generator is not new, neither is CO2 monitoring. so what's the big deal?
Also, according to Claude[1] a 50ppm difference is equivalent to around 25 years current atmospheric carbon increase.
* Pre-industrial (1700s): ~280 ppm
* 1958 (when systematic measurements began): ~315 ppm
* 2000: ~370 ppm
* 2015: ~400 ppm (milestone crossed)
* Current: ~420-425 ppm
[1] "What is the normal range for background CO2 concentrations in the air?"
Average indoor air quality ranges from 400-1000 ppm CO2, with adverse mental effects starting to appear close to 2000 ppm.
In that context, you can see why a 50 ppm difference is marginal. This is why asking an LLM is not generally a great idea for understanding something - you need to follow it up with more research.
cognition is harmed starting at 1000ppm (https://pmc.ncbi.nlm.nih.gov/articles/PMC3548274/)
3.6V is the maximum value that the nrf52832 SoC can handle. I would suspect the VDD is variable.
We do a lot of testing against reference grade sensors and typically see very good performance and reproducibility [1].
[1] https://www.airgradient.com/blog/performance-of-low-cost-co2...
It is easy to create a low power chemical CO2 sensors with a service life of a few weeks/months. Obviously not pratical for real world applications. So critical data is missing in this press release.
You could maybe get by with some sort of antibody coagulation stuff like in many rapid test strips, but these are to my knowledge not reversible.
Ingenious, I love it.
noisy_boy•7mo ago