السلام عليكم

هذا مخطط لدائره ساعه رقميه





*********************************** ****

Pattern drawing of Digital Clock
(Wiring side)




Olive-green line shows the wiring at the component side.
Pink lined parts shows the external parts.

*********************************** ****

Digit display circuit



*********************************** ****

Clock control PIC ( PIC16F873 )





Peripheral circuit CPLD ( XC9536-PC44 )




Melody IC ( SVM7975C )





Low-frequency amplifier ( LM386N-1 )





Power for disply ( 78L05 )





Power for low-frequency amplifier ( 78L09 )





Power for TV tuner ( 78L12 )





Power for basic part ( S813-50HG )





LED control transistor ( 2SA1015 )