TT043: Maha Air Quality Sensor

Owned by Jim MacArthur
Last updated: Sept 16, 2021
1 min read

Measures CO2, O2, and airflow.  Uses a TipTop1590G base with ToprCO2 and ToprO2Flow.

12V power.

First prototype used Rev00 TipTop1590G, which requires an ECO to bring out a second serial port.  Here's the marked-up schematic:




Any future protos will use Rev01, which doesn't need the ECO.

ToprCO2 is a simple transition board for the T6613 CO2 meter:



ToprO2Flow is another simple board, with the LOX-O2 meter and the Posifa PAV1015 flow meter:



Top view:  The USB connector should face down for the flow meter to register a rising air current.



Arduino code:



Copyright © 2024 The President and Fellows of Harvard College * Accessibility * Support * Request Access * Terms of Use