Melody generator circuit by IC- UM66T

In the circuit basically usability base IC UM66T use sound of music sweet-sounding origin and be usable easily. It use just integrated one circuit and a loudspeaker , piezo buzzer , the small-sized , and have power supply 3V only. The detail is other of integrated number this circuit.
The UM66T series are CMOS LSI designed for using in door bell, telephone and toy
application. It is an on-chip ROM programmed for musical performance. Produced by CMOS
technology, the device results in very low power consumption. Since the UTC UM66TXXL Melody generator IC series include oscillation circuits a compact melody module can be constructed with only a few additional components.


Part number Song name
UM66T-01L Jingle Bells + Santa Claus Is Coming To Town + We Wish You A Merry
UM66T-05L Home Sweet Home
UM66T-09L Wedding March (Mendelssohn)
UM66T-19L For Alice
UM66T-32L Coo Coo Waltz
UM66T-68L It Is A Small World

The music sound with UM66T

Most circuits, we find that the IC number UM66T common because the smaller ICI power consumption of culture is not very easy. Choose music that has many songs together.
Operation of the circuit when the power supply circuit are currents flowing through LED1 LED1 light and the electricity flowing into pin 2 of IC1 IC1 make music production work.

Not: C1,can change to 10uF or 1uF to more. R2,can change to 100 ohms and lower.


You can hear the normal level music from 8 ohms speaker. as below video:

The output from pin 3 to C1 through the bias of the legs B Q1 Q1, which will force the amplifier to drive speakers then.

Easy create music by UM66T

Operation of the circuit. When the circuit to the power supply. Is current flowing through R1 and LED1 LED1 light of the C1 will serve to filter noise ground. Voltage drop across LED1 is to be paid to voltage signal generator IC1 out of three legs then the amplifier Q1, Q2 connected together in a darlington transistor. In order to drive speakers with R1, R2 in Limited current circuit will flow through each device to prevent equipment damage.


You can hear melody music sound for this circuit at below.

Buzzer sound with ic UM66T

This is a simple musical doorbell sound or Buzzer sound circuit.When I switch to musical voice out of small speakers. Period of time.This size range power supply 3V,IC number UM66T audio production functions of various Toy Gallery, And increase the delay circuit includes a transistor and capacitor.
Operation of the circuit be When the switch S1, capacitor C1 will charge as fast as a result, Q1, Q2 the bias.Make a strong drop across R3 is a current flowing into pin 2 of IC1. Made IC1 work, If the switch S1 C1 will be discharged, through R1 to Q1.As a result, the lighter music of the period ever release the audio when the switch is based on the value of C1.

Buzzer sound with ic UM66T

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  1. himanshu banti June 15, 2013
  2. admin November 2, 2013

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