Welcome to the Traffic Light Control System project! This project is designed to control a set of traffic lights using a PIC16F877A microcontroller. It features both automatic and manual modes of operation, allowing the user to simulate traffic light sequences in a way that is both practical and educational.
This project simulates a traffic light system with two sets of traffic lights, each consisting of red, yellow, and green LEDs. The system is designed to operate in two main modes:
- Automatic Mode: The lights change according to a pre-programmed sequence, mimicking the behavior of real traffic lights.
- Manual Mode: The user can manually cycle through the lights using a button, providing more control for testing or demonstration purposes.
Check out the demo video to see the Traffic Light Control System in action:
Click the image above to watch the video on YouTube.
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Port Definitions: The code defines the pins used for the traffic light LEDs, making it easy to reconfigure if the hardware setup changes.
#define ledR1 portd.b0 #define ledY1 portd.b1 #define ledG1 portd.b2 #define ledR2 portd.b3 #define ledY2 portd.b4 #define ledG2 portd.b5
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Automatic Mode: The
automatic_modefunc 6D4C tion controls the lights in a sequence, simulating the traffic flow at an intersection. The sequence includes a countdown feature to signal when the lights will change. -
Manual Mode: The
manual_modefunction allows the user to manually cycle through the traffic light states using a button. This mode is useful for testing and demonstrations. -
Interrupt Handling: The system uses an interrupt to switch to manual mode, ensuring that the user can take control at any time without disrupting the main operation.
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State Management: The code uses global variables to manage the state of the lights and control the flow of the program.
This project is designed for use with a PIC16F877A microcontroller. The LEDs are connected to PORTD, and the buttons for mode selection and LED cycling are connected to PORTB.
- LEDs:
- Red Light 1:
PORTD.B0 - Yellow Light 1:
PORTD.B1 - Green Light 1:
PORTD.B2 - Red Light 2:
PORTD.B3 - Yellow Light 2:
PORTD.B4 - Green Light 2:
PORTD.B5
- Red Light 1:
- Buttons:
- Manual Mode Trigger:
PORTB.B0 - LED Cycle Button:
PORTB.B1
- Manual Mode Trigger:
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Clone the Repository:
git clone https://github.com/yourusername/traffic-light-control.git cd traffic-light-control -
Compile and Upload the code to your PIC16F877A microcontroller using your preferred IDE (e.g., MPLAB X).
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Connect the Hardware as described in the Hardware Setup section.
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Run the System:
- The system will start in automatic mode by default.
- Press the button connected to
PORTB.B0to enter manual mode and cycle through the lights using the button connected toPORTB.B1.
main.c: The main code file containing the traffic light control logic.README.md: This file, providing an overview of the project and instructions for use.
- Add support for pedestrian crossing signals.
- Implement a more sophisticated timing algorithm for the automatic mode.
- Integrate with a real-time clock module for more accurate timing.