https://github.com/basilfx/lpc810-fancontroller

Tiny PID-based fan controller board and firmware to insert between 3-pin fans.
https://github.com/basilfx/lpc810-fancontroller

Last synced: 8 months ago
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Tiny PID-based fan controller board and firmware to insert between 3-pin fans.

• Host: GitHub
• URL: https://github.com/basilfx/lpc810-fancontroller
• Owner: basilfx
• License: mit
• Created: 2014-12-09T00:11:04.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2024-07-09T00:06:16.000Z (almost 2 years ago)
• Last Synced: 2025-01-14T01:13:36.874Z (over 1 year ago)
• Language: C
• Size: 241 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# LPC810 Fan Controller

Tiny PID-based fan controller board and firmware, to insert between 3-pin fans.

## Contents

* Eagle schematic and PCB

* Firmware

* PID simulator and monitor

## Eagle

### Bill of Materials

The value of is a pullup resistor for the DS18B20 temperature sensor. While 4.7k is adviced, I use 470 in parasite mode. Higher values did not work for higher temperatures.

| Part | Value  | Device          | Package |

|------|--------|-----------------|---------|

| R1   | 470    | R-EU_R0603      | R0603   |

| R2   | 10k    | R-EU_R0603      | R0603   |

| R3   | 10k    | R-EU_R0603      | R0603   |

| R4   | 10k    | R-EU_R0603      | R0603   |

| C1   | 100nF  | C-EUC0603       | C0603   |

| C2   | 2.2µF  | C-EUC0805       | C0805   |

| C3   | 100nF  | C-EUC0603       | C0603   |

| C4   | 2.2µF  | C-EUC0805       | C0805   |

| Q1   | BSH103 | MOSFET-NCHANNEL | SOT23   |

| U1   | LP2985 | LP2985-33DBVT   | SOT95P  |

| U2   | LPC810 | LPC810M021FN8   | DIP8    |

### Board render

The board measures 0.45x0.95 inch. Below a render of the top and bottom.

![brd](https://raw.githubusercontent.com/basilfx/LPC810-FanController/master/docs/board.png)

## Firmware

The firmware can be found in the `firmware/` folder. It compiles fine with the [GCC ARM Embedded](https://launchpad.net/gcc-arm-embedded) toolchain. Just run `make`.

## Contrib

In the `contrib` folder contains some tools to test the PID controller. First, run `python setup.py build_ext --inplace` to build a Python wrapper for the exact same PID controller in the firmware. This requires Cython to be available.

## License

See the `LICENSE` file (MIT license).

This software makes use of other software. Please see `firmware/README.md` for more information.