•  
  •  

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

Agilent Varian TV701 9698977 Turbo Pump Controller with Bracket
$1299.99 Agilent Varian TV701 9698977 Turbo Pump Controller with Bracket picture
XtremepowerUS 4CFM Air Vacuum Pump HVAC A/C Refrigeration Kit AC Manifold Gauge
$0.99 XtremepowerUS 4CFM Air Vacuum Pump HVAC A/C Refrigeration Kit AC Manifold Gauge  picture
XActo Pink Manual Pencil Sharpener with Vacuum Mount.
$4.0 XActo Pink Manual Pencil Sharpener with Vacuum Mount. picture
Watts 3/4 288A Vacuum Breaker rebuild kit w/ Brass cap and diaphragm
$34.0 Watts 3/4 288A Vacuum Breaker rebuild kit w/ Brass cap and diaphragm picture
Vacuum Bell For Pectus Excavatum
$240.0 Vacuum Bell For Pectus Excavatum picture
  • 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.