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Topic: Problems programming an arduino for a CO gas sensor (Read 3998 times) previous topic - next topic


Digital ouptut to HSW pin, digital input from ALR, power and ground.

What do you mean by what you wrote here?


Sorry, that should have said "output to HSW"
Per Arduino ad Astra


Sorry, I don't understand the "power and ground" thing.


You need to connect a 5V supply (power) capable of supplying > 160mA, and you need to connect the ground pin on the sensor board to the ground (GND) on your Arduino.
Per Arduino ad Astra

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