The simulated vibration sensor based on piezoelectric ceramic plate is an inverse transformation process using piezoelectric ceramics to generate vibration. When the piezoelectric ceramic plate vibrates, it generates an electrical signal. Combined with a special sensor expansion board, the sensing ability of the analog port is weak. Vibratory electrical signals enable interactive work related to vibration, such as the interaction of electronic drums. output: Connect the analog voltage ceramic vibration sensor to the analog terminal A0 of the controller according to the program. When the vibration degree is different, the output value of the serial port can be observed to realize the vibration-related input According to the vibration intensity, the higher the output voltage, the potentiometer can adjust the sensitivity of the vibration amplitude. The product has high sensitivity and can be adjusted to blow with the mouth or tap the output with the hand (low turn sensitivity, high right turn sensitivity). Colour:As Shown Material:PCB Package Contents: 4 x Tapping Sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.