•  
  •  

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

New Genuine Honeywell Enhanced XEON 1900 USB Barcode Scanner (No USB Cable)
$109.95 New Genuine Honeywell Enhanced XEON 1900 USB Barcode Scanner (No USB Cable) picture
TYAN S7018GM3NR S7018GM3NR-B Intel Dual Xeon 5500 LGA1333/ (6+6) DIMMs/ (3) GbE
$479.0 TYAN S7018GM3NR S7018GM3NR-B Intel Dual Xeon 5500 LGA1333/ (6+6) DIMMs/ (3) GbE picture
Bitcoin & Litecoin Merged Mining Pool (NMC / DOGE) Plug & Play Setup Make $$$$$
$24500.0 Bitcoin & Litecoin Merged Mining Pool (NMC / DOGE) Plug & Play Setup Make $$$$$ picture
NASUNI FILER NF-400 DELL OEMR XL R720xd 32GB RAM Intel Xeon E5-2620 X 2 NO HDD
$499.99 NASUNI FILER NF-400 DELL OEMR XL R720xd 32GB RAM Intel Xeon E5-2620 X 2 NO HDD picture
ShortArc xeonlite xeon lamp
$15.0 ShortArc xeonlite xeon  lamp 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.