https://github.com/lily-osp/interrupt-based-ac-lamp-control
This repository contains a program or programs that control the brightness of an AC lamp using interrupt and pulse width modulation (PWM) techniques. A potentiometer is used to adjust the lamp's brightness.
https://github.com/lily-osp/interrupt-based-ac-lamp-control
arduino control-systems pwm zero-cross
Last synced: 3 months ago
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This repository contains a program or programs that control the brightness of an AC lamp using interrupt and pulse width modulation (PWM) techniques. A potentiometer is used to adjust the lamp's brightness.
- Host: GitHub
- URL: https://github.com/lily-osp/interrupt-based-ac-lamp-control
- Owner: lily-osp
- License: mit
- Created: 2022-12-23T08:28:08.000Z (over 2 years ago)
- Default Branch: master
- Last Pushed: 2023-10-10T15:41:51.000Z (over 1 year ago)
- Last Synced: 2025-01-20T11:11:57.222Z (5 months ago)
- Topics: arduino, control-systems, pwm, zero-cross
- Language: HTML
- Homepage: https://1999azzar.github.io/Interrupt-based-AC-Lamp-Control/
- Size: 224 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# AC Lamp Brightness Control using Interrupt and PWM
[](https://www.codefactor.io/repository/github/1999azzar/interrupt-based-ac-lamp-control)
This program controls the brightness of an AC lamp using interrupt and pulse width modulation (PWM) techniques. A potentiometer is used to adjust the lamp brightness.
## Code Description
The code is written in C/C++ and can be uploaded to an Arduino or similar microcontroller. It consists of three major functions: `setup()`, `zero_cross()`, and `loop()`.
### Function Descriptions
1. `setup()`: This function is executed once when the program starts. It performs the following tasks:
- Sets the lamp pin (`LAMP`) as an output.
- Attaches an interrupt to digital pin 2 using `attachInterrupt()`.
2. `zero_cross()`: This function is called whenever there is a change on digital pin 2. It performs the following tasks:
- Calculates the dimming time for the lamp based on the current `dim_val` value.
- Delays for the calculated dimming time using `delayMicroseconds()`.
- Turns on the lamp for a brief period using `digitalWrite(LAMP, HIGH)` and `delayMicroseconds()`.
- Turns off the lamp using `digitalWrite(LAMP, LOW)`.
3. `loop()`: This function runs continuously after the `setup()` function. It performs the following tasks:
- Reads the value from a potentiometer using `analogRead(A0)`.
- Maps the potentiometer value to a range between 10 and 49 using `map()`.
- Updates the `dim_val` variable with the mapped value.
### Hardware Requirements
- AC lamp
- Microcontroller board (e.g., Arduino)
- Potentiometer
- Connecting wires
## Flowchart
The flowchart below illustrates the flow of control and the sequence of actions performed in the code.
```mermaid
graph LR
A[Start] --> B[Setup]
B --> C[Attach Interrupt]
C --> D[Read Potentiometer]
D --> E[Map Potentiometer Value]
E --> F[Update dim_val]
F --> G[Loop]
G --> H[Calculate dimming_time]
H --> I[Delay]
I --> J[Turn on Lamp]
J --> K[Delay]
K --> L[Turn off Lamp]
L --> G
```
The flowchart demonstrates how the program initializes, reads the potentiometer value, calculates the dimming time, and controls the lamp's brightness using interrupt and PWM techniques.
## Usage
To use this code, follow these steps:
1. Connect the AC lamp to the microcontroller's output pin (`LAMP`).
2. Connect a potentiometer to the microcontroller's analog input pin (`A0`).
3. Upload the code to the microcontroller.
4. Observe the changes in the lamp's brightness as you adjust the potentiometer.
## Contributing
Contributions to this project are welcome. You can fork the repository, make improvements, and submit a pull request.
## License
This code is released under the [MIT License](LICENSE).
Feel free to use, modify, and distribute this code for personal and commercial purposes.
## Acknowledgements
Special thanks to the Arduino community for their support and resources.
If you find this code helpful, please give it a star!
## Support
You can support me by buy me a coffee if u like to.
