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This page is no longer being updated and the new repo is uptime-industries/compute-blade


Compute Blade Fan Unit

When just a fan is ... boring

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About The Project

Fan Unit v0.6

The main purpose is to cool Compute Blade installed in the enclosure.
Requires 1 Fan Unit per 2 Blades. That is, up to 10 Fan Units per 19" enclosure.

There were many iterations.There are two versions left in the final:

Dumb Fan Unit Features

  • Isolated powering from both blades at the same time, control from the left in the pair.
  • It is possible to control the speed of fan rotation and get the current speed (RPM). As with any 4-pin PWM Fan.

Smart Fan Unit Features

  • 2 UART for communication with blades
  • 2 temperature sensors
  • 2 LEDs for indicating which blade is working
  • 2 Digital RGB LEDs
  • 1 LED to GPIO25
  • PWM fan
  • Button that can be assigned to any action
  • Reset and BOOT buttons (for RP2040 code development)

Various usage scenarios are possible.

For example

  • It adjusts the speed and color of the digital LEDs depending on the temperature of the airflow. You can specify the desired speed from both blades simply by UART.
  • Blades can report processor temperatures via UART, and the Fan Unit sets the fan speed and color of the digital LEDs. The button can work for blade identification.
  • TBD

Images

20x Fan Units in 2U 19" 20x_Fan_Units

5x Fan Units in 1U 10" 5x_Fan_Units

Smart Fan Unit v0.8 Fan_Unit_v0.8 Fan_Unit_v0.8

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Fan unit for Compute Blade enclosure

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