Designing an Ozone and NO2 Module

A project log for Street Sense

Portable electronic device to measure air and noise pollution

Mike TeachmanMike Teachman 06/26/2019 at 19:070 Comments

Continuing with stripboard construction methods, the ozone and NO2 sensor module was built.  This module also contains a LDO voltage regulator, the 24-bit ADC, and a temperature sensor.  The readings from the two sensors will need to be compensated wrt temperature - that is the reason to locate the temperature on this module.   An overview of the modules is described in an earlier project log From Breadboard to Enclosure - Part 1.

This stripboard module can be considered a stepwise improvement.  Compared to the boardboard prototype it should give improved performance for the Spec Sensor modules, but will still be lacking compared to a properly laid out PCB.

The module includes the major components U6, U8, U9, U10, U11 found in the schematic.