Ding-Dong sound generator

Posted on Feb 5, 2014

This is the circuit diagram of a ding dong sound generator based on two NE555 timer ICs. The circuit is designed to toggle between two adjustable frequencies to produce the ding dong sound. The first NE555 (IC1) is wires as an astable multivibrator operating at 1Hz. The frequency of the second NE555 (IC2) is modulated by the output from the first I

Ding-Dong sound generator
Click here to download the full size of the above Circuit.

C. This is attained by connecting the output of first IC to the control pin (pin5) of the second IC. The tone of the sound depends on the frequency of the second IC and the changeover time depends on the frequency of the first IC.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Single Supply RS232 Interface for Bipolar AD converters
    LED effects with ATTYNI2313
    Preamplifier and high-to-low impedance converter
    The Second W9VES
    Antenna Low Power RF & Wireless Connectivity
    wave antenna circuit
    4 i n 1 burglar alarm circuit diagram
    Robo Atmega328p project
    Voltage Controlled Frequency Divider with Variable Division Ratio
    The use of self-induced emf achieve instant protection circuits