Thread: Limit desk fan
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Old 23rd Aug 2019, 7:02 pm   #7
Hartley118's Avatar
Join Date: Aug 2015
Location: Cambridge, Cambs. UK.
Posts: 1,696
Default Re: Limit desk fan

At Vent Axia, we abandoned triac speed control because of the ‘buzzy’ acoustic noise problem. Speed control was by inductors or auto transformer, but I find series capacitors just as effective. I’d start by trying 1or 2 uF.

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