I have a 5v usb fan and I want to reduce the speed. how would I do it?
the fans on my laptop cooler is too loud.
thanks
I have a 5v usb fan and I want to reduce the speed. how would I do it?
the fans on my laptop cooler is too loud.
thanks
@Rayjay
What needs to be understood here is that a potentiometer will work, but it is not built to handle the load of something like a fan, so its lifespan would be reduced. A good simple method is to put a diode in series with the fan, a common diode has a voltage drop of about 0.7v so this will give you 4.3v from your 5, to drop it more simply add another diode Just make sure you buy (salvage) one that can handle 500mA (milliamp) or more such as 9564993RL. VT2095's circuit would allow you to actually vary the voltage. However if your fan is noisy, it may be worth looking at the fan itself for damage/wear.
5v-4.7v
5v-3.6v
@Rayjay
What needs to be understood here is that a potentiometer will work, but it is not built to handle the load of something like a fan, so its lifespan would be reduced. A good simple method is to put a diode in series with the fan, a common diode has a voltage drop of about 0.7v so this will give you 4.3v from your 5, to drop it more simply add another diode Just make sure you buy (salvage) one that can handle 500mA (milliamp) or more such as 9564993RL. VT2095's circuit would allow you to actually vary the voltage. However if your fan is noisy, it may be worth looking at the fan itself for damage/wear.
5v-4.7v
5v-3.6v
