Touch Sensitive Musical Bell Circuit

Listing ID #964072

Touch Sensitive Musical Bell Circuit gives a different melody sound for every touch. This Touch Sensitive Musical Bell generates different musical tones every time the plate is touched. If the plate is touched for more than two seconds, it gives a sound (beep-beep) different from the musical tone. Musical tune is produced after removal of the hand touching the plate. Only a few additional components are required to achieve excellent results.
About the Circuit :
The heart of the circuit is a musical tone generator IC APM993D (IC1). This is a programmed 1024 note ROM memory IC, which has inbuilt oscillator and tone generator. Touch plate is connected to base of transistor T1. When the plate is touched, T1 conducts and IC1gets triggered. Hence, it generates a musical tone. The output at pin 14 of IC is driven by transistors T2  in turn drives 8W Loudspeaker. Care should be taken that battery supply should not be greater than 3V.