Voltage reduction

C

clovis

New Member

• Feb 22, 2012

• #1

How to reduce 9volt battery to opperate a 5 volt micro fan would rather the easiest solution thanks.

 

Reloadron

Well-Known Member

Most Helpful Member

• Feb 22, 2012

• #2

Use a 5 volt regulator like the LM7805 which can be bought just about anywhere and can be seen here.

That assumes this fan does not draw any power to speak of. A link to the fan data sheet would be nice. Also, the fan likely will not run long on a standard 9 volt battery.

Ron

 

Last edited: Feb 22, 2012

alec_t

Well-Known Member

Most Helpful Member

• Feb 22, 2012

• #3

The simplest solution (though not ideal) might be just a suitable series resistor. Pity we don't have more details of the fan and how concerned the OP is about fan speed.

 

Reloadron

Well-Known Member

Most Helpful Member

• Feb 22, 2012

• #4

Yeah, I thought about that and it is commonly done for small fans.

Ron

 

crutschow

Well-Known Member

Most Helpful Member

• Feb 22, 2012

• #5

A series zener diode of the appropriate voltage and power rating would also work.