Simple Water Detection Sensor
This palm-sized cherry-red water sensor is simple
Screenshots
Hunter's comment
The sensor has a very lightly biased transistor that is connected to two long sets of interlocking traces. When a lil bit of water/condensation lands on the PCB and touches two of the traces, the transistor will turn on, setting the output pin high.
Link
https://www.adafruit.com/product/4965
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This palm-sized cherry-red water sensor is simple
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Simple Water Detection Sensor with Digital Output
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This could be a useful technique for huge projects.
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