In this project we made digital clock. We used microcontroller which one is PIC16F877A and seven segment displays. We have made our clock, adjustable time with push buttons. A list of materials;
- PIC16F877A
- 4 seven segment displays
- 4 Bcd to Seven Segment Decoder (74LS47)
- Crystal 20MHz
- 5 push buttons
- 2 leds
- and a lot of capacitors and resistors
Hardware Schematic
12:34
C0-C1-C2-C3 => 4
C4-C5-C6-C7 => 3
D0-D1-D2-D3 => 2
D4-D5-D6-D7 => 1
B0 => SET
B1 => UP
B2 => DOWN
B3 => RIGHT
B3 => LEFT
B5 => blinks led every second
Flowchart of Clock
Flowchart of Interrupt
Result
