Alarm Generator Project Using UM66TXXL CMOS IC

um 66 music alarm circuits


Alarm Generator Circuit Project Using UM66TXXL CMOS IC

Melody Music Project Description

This simple alarm generator electronics circuit utilizes a UM66TXXL TO92 package CMOS IC that generates song depending on the type of IC used. It has a built in oscillation circuit and need only a few external components to make it work. It is powered by a power supply range from 1.5V to 4.5 V DC with low power consumption, hence a longer battery lifetime. Once it power on reset, the melody will begin to sound. The part number for different songs are as listed below.

UM66T05L Home Sweet Home
UM66T11L Love Me Tender
UM66T19L For Alice
UM66T32L COO COO waltz

um66 alarm generator buzzer schematic

PARTS LIST
IC1 UM66TXXL CMOS IC
BUZ1 BUZZER
SW1 SWITCH
BT1 2 to 3 1.5V BATTERIES, BATTERIES HOLDERS

The IC can be used to drive a buzzer directly or driving a speaker though the use of a transistor.

um 66 alarm generator speaker schematic

PARTS LIST
R1 4.7KΩ
C1 0.1µF Ceramic CAPACITOR
Q1 HE8050S OR BC547  NPN TRANSISTOR
IC1 UM66TXXL CMOS IC
SP1 SPEAKER
SW1 SWITCH
BT1 2 to 3 1.5V BATTERIES, BATTERIES HOLDERS
UM66 COMS IC PIN Configuration  Top View

UM66 COMS IC PIN Configuration

Please send your ideas, which are very important for our success…


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2 comments on “Alarm Generator Project Using UM66TXXL CMOS IC
  1. saikat says:

    Your site is very helpful. I get much help

  2. Suhaib Tanveer says:

    Hey,
    you said we can use ic um66 with buzzer directly but can we use transistor with resistance with ic um66 and a buzzer with it(as you did it with speaker)

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