•  
  •  

Beeper

This circuit produces the sound of a beeper like the one in pagers which produces a “beep-beep” sound. Basically the circuit consists of a 555 timer oscillator which is turned ON and OFF periodically.
The first IC(left) oscillates at about 1Hz. The second IC is turned ON and OFF by the first IC.
The first IC determines how fast the second IC is turned ON/OFF and second IC determines the tone of the final output.
By varying the VR1, the changeover rate can be adjusted. By varying VR2 the tone can be adjusted.

If you know something about electronics, you can try replacing the 2nd 555 IC circuit with a piezoelectric buzzer. This saves one IC and associated components but the buzzer cannot give a loud sound as the speaker and also its tone cannot be varied.

If there are any problems please contact webmaster@electronic-circuits-diagrams.com

Please share & like


MSA ALTAIR 4X/XR Phosphorescent Multi-gas Detector (LEL,O2,Co,H2S) 18 picture

MSA ALTAIR 4X/XR Phosphorescent Multi-gas Detector (LEL,O2,Co,H2S) 18

$111.95



MSA Altair 5X, Bluetooth, Color Screen, Extras picture

MSA Altair 5X, Bluetooth, Color Screen, Extras

$899.99



34L - MSA Altair 4, 4X, 4XR, 5, 5X, Solaris Calibration Gas picture

34L - MSA Altair 4, 4X, 4XR, 5, 5X, Solaris Calibration Gas

$168.00



58L - MSA Altair 4, 4X, 4XR, 5, 5X, Solaris Calibration Gas picture

58L - MSA Altair 4, 4X, 4XR, 5, 5X, Solaris Calibration Gas

$206.00



MSA altair 4X multi gas Meter Monitor detector, O2,H2S,CO,LEL (No Charger) picture

MSA altair 4X multi gas Meter Monitor detector, O2,H2S,CO,LEL (No Charger)

$199.95



  • Shahariare Rashid Khan

    i want to make a beep-beep-beep buzzer audio circuit with 2n2222a. please help me. .
    i build one but getting only beeeeppppppppppppppppp. no beep-beep-beep.