Melody generator circuit | Musical Toys

Circuit of musik|melody generator you can make using an IC.The UM66 series are CMOS IC’s designed for using in calling bell, phone and toys. It has a built in ROM programmed for playing music. The device has very low power consumption.Thanks for the CMOS technology.The melody will be available at pin3 of UM66 and here it is amplified by using transistor Q1 dan Q2 to drive the speaker.

UM66 is a pleasing music generator IC which works on a supply voltage of 3V. the required 3V supply is given through a zener regulator. its out put is taken from the pin no1 and is given to a push pull amplifier to drive the low impedance lowd speker. A clss A amplifier before pushpull amplifier can be used to decrese the noise and improve out put. UM66 is a 3 pin IC pakage just looks like a BC 547 transistor.

Notes

    Power supply must be between 6V - 15V .
    Melody begins from the first note if power is reseted.
    Assemble the circuit on a good quality common board.



IC UM66 Description
The U66 series is a CMOS LSI designed melody generator IC for use in telephones and toys application. It has an on-chip ROM programmed for musical performance. Produced by CMOS technology, the device results in very low power consumption. And with built-in RC oscillator, a compact melody module can be constructed with only a few additional components.

Pin No Designation Description

-1. Out put Melody out put

-2. +Vdd Positive power supply

-3. -Vss Negative Power supply

Features of UM66T series

-62 Note ROM Memory

-Voltage rating: 1.3V to 3.3 V

-Power on reset

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