Description
About the circuit:
When switch S1 is pushed on, voltage at pin 10 triggers IC APM993D. After triggering, IC plays a musical tone.16 musical tones can be heard simultaneously on pressing S1 sixteen times.
Transistor T1 is used as an amplifier connected to chip preamplifier output at pin 14 to drive 8W loudspeaker.
Resistor R1 controls the tempo i.e. the speed at which tune is played. Tempo can be varied as per choice by changing the value of R1.
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