Questions tagged [touch]

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Understanding Touch Switch with BJTs and Relay

We worked on this circuit today in one of my labs and it had my groupmates and I puzzled. We had a 1k resistor in series with an LED on the NO side of the relay. I searched for the circuit online and ...
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How do I read a simple touch sensor value from Arduino? [closed]

I suppose instead of connecting to the LED it will connect to A3 on the Arduino for example but I'm having a hard time making it work. I don't know which point on the circuit should be connected to ...