•  
  •  

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

SIEMENS 6ES5 308-3UC11 6ES5308-3UC11 SIMATIC BOARD
$370.0 SIEMENS 6ES5 308-3UC11 6ES5308-3UC11 SIMATIC BOARD picture
Siemens C79458-L2343-A2
$120.0 Siemens C79458-L2343-A2 picture
Siemens Sinumerik 802D 6FC5610-0BA10-0AA1 6FC56100BA100AA1
$7300.0 Siemens Sinumerik 802D 6FC5610-0BA10-0AA1 6FC56100BA100AA1 picture
Siemens Sinumerik 810 T 6FC3171-0AA-Z
$3700.0 Siemens Sinumerik 810 T 6FC3171-0AA-Z picture
SIEMENS 6SN1118-0DM21-0AA0 CONTROL MODULE W/FEEDBACK 2 AXIS 6SN11180DM210AA0
$920.0 SIEMENS 6SN1118-0DM21-0AA0 CONTROL MODULE W/FEEDBACK 2 AXIS 6SN11180DM210AA0  picture