Circuit connection of Arduino tutorial: Piezo element to detect vibration

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Circuit connection of Arduino tutorial: Piezo element to detect vibration

Circuit connection of Arduino tutorial: Piezo element to detect vibration. Piezos are polarized, meaning that voltage passes through them (or out of them) in a specific direction. Connect the black wire (the lower voltage) to ground and the red wire (the higher voltage) to analog pin 0. Additionally, connect a 1-megohm resistor in parallel to the Piezo element to limit the voltage and current produced by the piezo and to protect the analog input.

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