#DIY #homeMade #HowTo make powerful low voltage step up boost converter circuit using LM2577 DC to DC adjustable to upgrade portable mini fan 3 time the original speed.

Initially using its own original circuit board the fan max speed as though using the battery itself - and after it has been upgraded the LM2577 can amplify the voltage from 4 volts to 12 volts which is 3 times the original speed. This IC is very cheap to get and yet it works better than the rest that I've tried because of its high current output..

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