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Slowing a noisy handheld fan? Answered

I am trying to slow a battery-powered (two AA batteries) handheld fan. It's obnoxiously loud for my project, but slowing it to about half speed will help cut the noise. I think running a resistor somewhere in the circuit will do it (planning to lengthen the wires anyway, so physically adding in isn't the issue,) but frankly there's a reason I'm in art instead of engineering. I've looked at the online calculators, but they want the amperage of the motor, which I don't know.

What kind of resistor do I need?  Or is there another way to slow or quiet it down?


Replace one battery with the same size wooden dowel covered in aluminium foil this will make the fan run at half speed.

May not be an issue with a fan - but your right.

This is right in my competence zone, and I even had a dowel that fit. Slowed it down to a manageable level. Thanks!

keep cool! :-) Sometimes the simple solution works.

I would try a potentiometer that way you could have variable speed control.


4 years ago

Put a 1N4001 in series in place of the intended Resistor.
This will work much better and drop only about 0.7Volts

or a 1N4002 or a 1N400x up to !n4006