# PWM_fan_controller

**Repository Path**: gavin_jing/PWM_fan_controller

## Basic Information

- **Project Name**: PWM_fan_controller
- **Description**: A smart fan controller use a STM32 MCU to cooling a LED light . The controller have 3 main function. 1.A GPIO generate a 25KHz PWM signal to control the fan speed. 2.The fan speed increase with temperature increasing. 3.When the temperature over 80 degress celsius, a buzzer sound. When the tmeperature over 100 degress celsius, the LED light power will be cut off
- **Primary Language**: C
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-08-24
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# PWM_fan_controller
[![software version](https://img.shields.io/badge/software%20-v0.6-green.svg)](https://github.com/jack0915/PWM_fan_controller)
[![hardware version](https://img.shields.io/badge/hardware-v0.0-yellow.svg)](https://github.com/jack0915/PWM_fan_controller)
[![Author](https://img.shields.io/badge/POWER%20BY-Jack%20Liang-blue.svg?)](https://github.com/jack0915/PWM_fan_controller)

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## Project description
A smart fan controller use a STM32 MCU to cooling a LED light . The controller have 3 main function.   
1.A GPIO generate a 25KHz PWM signal to control the fan speed.   
2.The fan speed increase with temperature increasing.   
3.When the temperature over 80 degress celsius, a buzzer sound. When the tmeperature over 100 degress celsius, the LED light power will be cut off  

update on 16th May,2017
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The NTC temperature has been read correctly. the DS18B20 digital sensor use to calibrate the NTC temperature. Due to the lookup table only have 1 degree accuracy, the NTC temperature lower than DS18B20 2 degrees. 
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In this application, the temperature does not need a high accuracy.
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Further job would update the lookup table and expand the array. The interpolation algorithm can also increase the accuracy.
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