12 Hour Digital Clock Circuit Diagram. When no buttons are pressed the circuit will display the current time starting at 12 00 on reset. Pulse generator for digital clock.
The clock runs from 00 00 to 11 59 and then back to 00 00. The 93 is set to count 0 5 by running two of the outputs b and c through a 7408 and gate which resets the ic on the sixth clock pulse and triggers the 74ls90 in the minute s section of the circuit. For 12h it will count from 00 to 11.
Ic 4026 pin.
The output for generating an alarm signal at pin 16. Our display has four digits two digits for minutes and two for hour. For 24h it will count from 00 to 23. When no buttons are pressed the circuit will display the current time starting at 12 00 on reset.
