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I ordered the PCB from JLCPCB: https://jlcpcb.com/

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Parts list (check website article for full list, affiliate links):
Amazon.com:
PMS5003 PM2.5 Sensor: https://amzn.to/3aK3djj
MH-Z19 CO2 Sensor https://amzn.to/3rBJLem
Nextion 2.8″ Display: https://amzn.to/3aIoutI

Banggood.com:
PMS5003 PM2.5 Sensor: http://bit.ly/37SkSn6
MH-Z19 CO2 Sensor http://bit.ly/37SJDPR
Nextion 2.8″ Display: http://bit.ly/2MgiMVJ

Poor air quality can lead to many negative health effects as well as can cause tiredness, headaches, loss of concentration, increased heart rate and so on. Monitoring the quality of the air may actually be more important than you realize. So, in this tutorial we will learn how to build our own Air Quality Monitor which is capable of measuring PM2.5, CO2, VOC, Ozone, as well as temperature and humidity.

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