I ordered like 5 of them the other day from JLCPCB it was like 6 bucks shipped to my place. I saw this post online, I’ve had the pm2.5 sensor sitting around fo

I ordered like 5 of them the other day from JLCPCB it was like 6 bucks shipped to my place. I saw this post online, I’ve had the pm2.5 sensor sitting around for a long time… https://benjamincongdon.me/blog/2021/08/08/DIY-Air-Quality-Sensor/ https://benjamincongdon.me/blog/2021/08/08/DIY-Air-Quality-S...