DIY Air Quality Meter And Emissions Tester

Handheld measuring devices make great DIY projects. One can learn a lot about a sensor or sensor technology by just strapping it onto a spare development board together with an LCD for displaying the sensor output. [Richard’s] DIY air quality meter and emissions tester is┬ásuch a project, except with the custom laser-cut enclosure and the large graphic LCD, his meter appears already quite professional.

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