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Topic: Breathalyzer Project (Read 764 times) previous topic - next topic

Ss131

Hello, I'm a student and trying to figure out how to use an arduino board to make a breathalyzer. The part I'm stuck on is not the alcohol reader (I'm using an MQ-3), but rather the air flow sensor. I need to ensure a constant flow is kept for 5 seconds. I've been searching the web but couldn't come up with much. Any help or suggestions for a component and programming would be greatly appreciated!
Cheers

Magician

The easy way to detect air flow, is to install temperature sensor and and warm resistor in close proximity. Passing air  would create a cooling effect, dropping reported temperature. Practical realization and coding for you

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