پیزو الکتریک 27mm

Description
Resonant Frequency: 3.2±0.4 KHz
Resonant impedance: ≤400 Ω
Capacitance at 1KHz: 35000±30% pF
Metal plate diameter: 27.0±0.2 mm
SPL Error Range : ≤8 db
PPM : ≤1000
Metal material: Brass
Applications
Production and detection of sound
Generation of high voltage
Electronic Frequency generation
Microbalances
Ultra-fine focusing of optical assemblies
How to Use a Piezoelectric Sensor?
To use a piezoelectric sensor is the easiest task, just connect the positive and negative terminal to your circuit and press the top of sensor.
By pressing, due to mechanical pressure it create voltage at output which is further feed to the circuit.
You can simply connect a LED to the piezoelectric sensor, as shown in the circuit below.
Whenever you press the sensor the LED will give a flash.