Network cabinet fan controller

WEBVTT

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A compact fan controller, designed around its cabinet: wired networking,
independent fan control, and a visible speed display inside one serviceable
puck.

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The outer cap follows a coarse printed thread, opening to reveal the
circuit board and the display assembly beneath it.

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This exploded view separates the bezel and light pipes to explain their
construction; the actual bezel is secured by fasteners from below.

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Each light pipe carries light from its board mounted LED to a dot on the
face, with ten speed positions and a separate status position.

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The LEDs are RGB devices, driven by a dedicated 36-channel
controller, so the hardware supports more than a single indicator color.

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An ESP32-S3 runs the control firmware, while a W five
thousand five hundred provides the wired Ethernet connection.

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Each fan has its own speed command and RPM feedback, allowing the firmware
to compare what it requests with what the fan actually does.

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Labeled MTA-100 headers support custom cable lengths, with
connector positions coordinated with the puck and its wire entry openings.

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Twelve volts powers the fans, while USB-C provides programming and
service power for the electronics; USB does not power the fans.

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The firmware prioritizes Ethernet with Wi-Fi fallback, bringing local
temperature based control and network monitoring together in the same
device.

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This is a routed development design: physical testing is still ahead, and
improved air temperature sensing is under evaluation.

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Explore the assembly, inspect the components, and follow the design from
the circuit board to the finished puck.