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bootstrapping and the need for a capacitor

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adsa

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hi! i'm a new member of this site and i would like to ask you some questions. what is the concept of bootstapping?

and i saw a schematic of a fan having a capacitor in parallel with it, what is that for? i oftenly see fans with diode across it but not capacitor...

THANK YOU AND GOD BLESS!!! :)
 

Someone Electro

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If you don't know a motor needs a bit more power on start.

The capacitator suplys the lithe spike of power to get the motor strarted.
 
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