PIEZO BUZZER INSIDE

Circuit Piezeo electric crystal based buzzer circuit Program (Arduino -for 20KHz) void setup() {  pinMode(13,OUTPUT); } void loop() { digitalWrite(13,HIGH); delayMicroseconds(10); digitalWrite(13,LOW); delayMicroseconds(12); } Waveforms (Note : attenuation probe *10 used) voltage wave form across piezeo electric crystal (40v ,Cout =0.1uF , f=4.7KHz) voltage wave form across piezeo electric crystal (50v  ,Cout =0.01uF , f=4.7KHz) voltage wave form across piezeo electric crystal (52v  ,Cout=220pF, f=4.7KHz) voltage wave form across piezeo electric crystal (28v  ,Cout =0.01uF , f=20KHz)