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DIY Hobby projects, diagram, schematic

Electronic Circuits

DIY Hobby projects, diagram, schematic

Alarm Generator Project Using UM66TXXL CMOS IC

electronicecircuits, August 8, 2009August 15, 2023
um 66 music alarm circuits

Alarm Generator Circuit Project Using UM66TXXL – UM66 – CMOS IC

Melody Music Project Description

This simple UM66 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 UM66 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
IC1UM66TXXL CMOS IC
BUZ1BUZZER
SW1SWITCH
BT12 to 3 1.5V BATTERIES, BATTERIES HOLDERS

The um66 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
R14.7KΩ
C10.1µF Ceramic CAPACITOR
Q1HE8050S OR BC547  NPN TRANSISTOR
IC1UM66TXXL CMOS IC
SP1SPEAKER
SW1SWITCH
BT12 to 3 1.5V BATTERIES, BATTERIES HOLDERS
UM66 COMS IC PIN Configuration  Top View

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

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Comments (2)

  1. saikat says:
    January 20, 2012 at 4:03 am

    Your site is very helpful. I get much help

    Reply
  2. Suhaib Tanveer says:
    January 6, 2015 at 3:36 am

    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)

    Reply

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