I hope this is the right place for this, go ahead and tell me to go away if it's not. I'm using four piezo buzzers as "knock" or "impulse" sensors, sending each into a different analog pin. I've attached a wiring diagram. The goal is to be able to detect which buzzer, of the four, gets hit. Unfort…

Analog input pins cross-talking while using piezo buzzers as sensors

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