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Feb 09, 2025, 06:44 PM Components needed: - Arduino board (e.g., Arduino Uno) - Breadboard - Jumper wires - 9V battery pack or batteries - Piezo sensor - LEDs (2-3) - Resistors (220 ohm and 1k ohm) - Push button or switch - Circuit wiring and insulation materials Step 1: Assemble the circuit: 1. Connect the piezo sensor to one of the Arduino's digital pins. 2. Connect the positive lead of a 9V battery pack or two 9V batteries in series to the other side of the piezo sensor, then through a...