Fan controller added to external hard drive

We all know just how much heat a hard drive can generate while it is in operation, and Alan decided to do something about the situation by designing a method to handle the heat efficiently. This was made possible by using a microcontroller as the brain alongside an LM35 temperature sensor, where the fan speed can be varied in 8 steps depending on the current temperature with a working range of 35 Celsius to 45 Celsius. We say work in an air conditioned room if possible, but otherwise, a regular external hard drive shouldn’t be hot enough to burn you with a touch, aye? He gets extra points for effort though.

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