PIC16F876A Adjustable Timer
A CCS C electronics study implementing multiplexed seven-segment display driving and time counting on a PIC16F876A.
About the Project
This CCS C study handles time display on a PIC16F876A and a multi-digit seven-segment module. The repository includes firmware sources, a Proteus schematic project, and a compiled HEX output.
How It Works
Configured for a 20 MHz clock, the firmware writes segment patterns to port B and digit-select masks to port C. Nested counters advance the hour, minute, and second digits. Each digit is enabled for roughly 2 ms to multiplex the display, while decimal-point patterns provide time separators.
Technologies
- CCS C: PIC firmware and direct port control.
- PIC16F876A: time counting and display scanning.
- Proteus: circuit schematic/simulation project.
Project Structure
Codes/main.c: segment tables, counters, and multiplexing loop.Schematics/schematic.pdsprj: Proteus circuit project.Codes/main.hex: compiled programming image.
Hardware
PIC16F876A, seven-segment display, 20 MHz crystal, buzzer, buttons, LED, and passive components.
Technical Notes
The current source demonstrates the display-scanning and time-counting core. Although buttons are listed in the documentation, a button-driven adjustment flow is not present in the source.