Voltage drop by resistor

[ppppenguin]

Originally Posted by vortalexfan

An Application of Ohm's Law should help you with this.

V=I/R

I hope this helps.

This is not correct.

V= I x R

Which can be re-arranged as:

I = V/R

or

R = V/I

It would help if the OP gave us an idea of what he's trying to do. A resistor might be the right way to drop the voltage. In other applications a voltage regulator chip might be better.