A one-to-four PC fan speed controller
KiCad Layout C Objective-C Assembly
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readme.md

Purpose

This repository is for the hardware and firmware for a PC fan controller. The controller is intended to allow the user to multi-plex a single motherboard output so that it may control up to 4 additional fans. The project will feature:

  • Up to 4 outputs
  • Motherboard-controlled outputs for each with user speed scaling
  • Soft-start to reduce load on the motherboard
  • Speed control for each fan when a motherboard speed signal is not present

Details of the project may be found at for(embed).

Project Status

Firmware for v1.2 (optional thermistor control) is under development.

Top, v1.2 Bottom, v1.2

Firmware for v1.1 is complete! Testing has been completely successful!