melody generator for


Posted on Feb 6, 2014

This tiny circuit comprising of a single 3 terminal IC UM66 can be built small enough to be placed inside a greeting card and operated off a single 3V flat button cell. There is not much to the circuit. The UM66 is connected to its supply and its output fed to a transistor for amplification. You can either use a 4ohm speaker or a ` flat` piezoelec


melody generator for
Click here to download the full size of the above Circuit.

tric tweeter like the one found in alarm wrist watches. The UM66 looks like a transistor with 3 terminals. It is a complete miniature tone generator with a ROM of 64 notes, oscillator and a preamplifier. When it first came into market, it was programmed for the "Jingle bells" tune. Now they come with a wide variety of different tunes.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Micro-Cap 9
    Line-voltage-automatic-night-light
    logic tutor circuit
    Metal detector circuit diagram 5
    Schematic diagram of clock circuit composed of AT89C2051
    Direct FM



    Top