Touch Controlled Musical Door Bell


Posted on Feb 5, 2014

This touch controlled musical bell circuit circuit produces a musical tone whenever someone touches the touch point designated as TP in the circuit. The circuit works from two AA cells and produces enough sound. The circuit uses IC UM 3481 commonly used in musical circuits. The IC contains a ROM with 512 musical notes, tone generator, rhythm gener


Touch Controlled Musical Door Bell
Click here to download the full size of the above Circuit.

ator, modulator, run off control, oscillators, frequency divider and preamplifiers, . So a very few number of components is required for this circuit. C1 and R1 act as the timing components for the built in oscillator. The transistor Q1 is used for driving the loud speaker. The base of the transistor Q2 is used as the touch point to trigger the musical bell.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    3-5Volt FM transmitter circuit use two BC547
    R/C Thermal Peak Detection NiCd Charger
    RS-232 data buffer
    Fm-transmitter 6
    amplifier audio small to use with 9v battery operated
    Simple low voltage Oscillator circuit
    Ballroom synchronous voice switching circuit with music
    Sawtooth voltage controlled oscillator
    Toy police car circuit



    Top