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how to determine mA

mikey395

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hi ive been having bit of trouble lately on how to find or measure how much mA i should feed the circuit i managed to find the current that travels through the resistors, can some1 show how to determine the mA that goes through a laser ive been using ohms law I=V/R but i still am having trouble
i am plannin to use 6 0r 9 volts i have 2 10ohm resistors in parrallel
So . .
I=V/R
I=9/5
then i get 1.8A?

this is were i get stuck, at the symbol
 
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Fiddy

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Good Hello,

what driver are you using?
are you trying to measure/calculate output or input current?
 

mikey395

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i want to measure how much current is going to be running through the circuit this is the driver i will be using/making
 

lasersbee

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FIRST..... you will need a Test Load to adjust the current or
you will blow your Laser Diode...:eek:

SECOND...
there are tons of posts on how to test for current...
You will at least need to TRY to do a little research and reading
on the Forum...

This should get you started.... (It was an easy find)....

http://laserpointerforums.com/f38/first-build-phr-803t-64962.html#post934196


Jerry
 
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