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
| PARTS LIST | |
| IC1 | UM66TXXL CMOS IC |
| BUZ1 | BUZZER |
| SW1 | SWITCH |
| BT1 | 2 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.
| 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 |
Please send your ideas, which are very important for our success…
Your site is very helpful. I get much help
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)