When
entering the power supply circuit, and switch S1 (Start), which is
attached press release switch off.Then current is flowing through R1,
R2, and C2.
Makes the capacitor C2 caused up When the switch S1
allows the C2 to discharge through R3. The pressure this causes the
clock input to the pin 8 of IC1a. The IC1a which will work with
production IC1b frequency to send it to the leg 14 (Clock) Of IC2.The
IC2 is a driver by ICs LED 10 is illuminated by the moon to the incoming
frequency. The IC1d the IC1c and work together. It will serve up audio
frequency generator, and then sent to the Piano Society (PZ1) loud
beep came out with LED light period.
source:eleccircuit.com
