When you put the metal close to the inductor attached to the board, the oscillation sound will change.
Sensitivity to detect 100 yen balls in your pocket.
With small parts and thick wiring patterns, this kit is a great introduction to electronic projects.
Power supply voltage: 9 V (6 V - 9 V).
Operating current: Approx. 2 mA
Sensor Inductor
Output Piezoelectric Buzzer *Oscillating sound changes with or without metal.
Operating Time: Approx. 250 hours (006P type alkaline battery).
Board Size (W x D x H): 2.5 x 2.3 x 0.7 inches (64 x 5