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Friday, July 24, 2020

To Reduce the Fan Noise in the PC Power Supply Unit

23 July 2020

Some power supply unit for the PCs have very noisy fans. The good one will come with a thermo controlled fan; the cheaper ones usually have this omitted especially when they are made for Bit-Coin mining machines. The solution is either to change the fan or have a fan speed controllers installed. This video describe how best to carry these works.
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 Update:

The circuit in the video used IRF 634 which has a rated voltage of about 500V.  A cheaper euivalent is IRF 744 rated at 250 V.   The components are listed as shown


The veroboard layout of the component and its connection is as shown below



 

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