This article is about remote operated musical bell using UM3481. The M348X series IC is a mask-ROM-programmed multi melody generator , implemented by CMOS technology. It is designed to play the melody according to the previously programmed information and is capable of generating 16 songs with 3 instrument effects : piano, organ and mandolin. The device also includes a pre-amplifier which provides a simple interface to the driver circuit. The M3481 series is intended for applications such as toys, door bells, music box, melody clock/timers and telephones.
The following circuit is infrared controlled musical bell. You can use any kind of remote control, for example, TV, DVD player remote control, etc. It can be switched from a distance of 5-10 meters provided that the remote control is directed towards the sensor. It uses TSOP1738 infrared sensor that triggers music built inside the UM3481 IC. You can use UM3482 and UM3483 that produce 12 and 5 melodies respectively. The sensor responds to 38Khz and it can be activated by any key of the remote control.
CLICK HERE: How to test UM3481
When you press the remote key the output pin of TSOP1738 goes low. Transistor Q1 then conducts to trigger the UM3481 at pin 4. After playing a music melody, it automatically stops. If you press the remote again, the IC plays another melody. In this way, you can play 8 melodies one after another.
The melody will repeat if pin 5 is connected to +6V(Pin 16) and will stop automatically if connected to GND(Pin 8). I recommend you to go through the datasheet of UM3481 to know more about it.
Click on the video below to see the output and process for making the circuit.
You can watch the process in the following video
UM3481 (8 songs)
- Jingle Bells
- Santa Claus Is Coming To Town
- Silent Night, Holy Night
- Joy To The World
- Rudolph, The Red-nosed Reindeer
- We Wish You A Merry Christmas
- O Come, All Ye Faithful
- Hark, The Herald Angels Sing.
which remote can i use to operate the circuit?
It works for any kind of TV/DVD/VCD remote. Press POWER, VOLUME AND CHANNEL SWITCHES.
musci autmtcly changedwtihout pressing any button.. :S why the music is nt stable ?
Please follow the instructions carefully again. I recommend you to make the project from the beginning once again, I am sure it works. Or see the datasheet to modify the circuit.
my music is not following remote it is playing automatically without any gap why this is happening pls reply
i am nt gettin diz ic….ver do i get it frm?…plzz rply..its urgent
you can buy this component from ebay.com.
i’ve tried this but song is not changing also i’ve checked again the circuit but the remote is not controlling the song 🙁 help