Jufran88
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- Feb 9, 2011
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Your driver should look like this:
Ignore some of the values because I got this from Daedal's post
In your schematic it looks like your using (2) 1 ohm resistors in parallel, which doesn't give you the 10 ohms you need. (2) 1 ohm resistors in parallel will give you .5 ohms. You only need (1) 10 ohm resistor (buy them at radioshack).
The reason for this is because the resistors after the pot sets the limit for the current. I think you included the 100 ohm pot resistor in your calculations. It's just to adjust the current so it's neglible in your calculations.
Put the test load where the laser diode would be and measure the current on the test load resistor.
If this doesn't help here is a website I think will help you better: *Laser driver - It can be done*
Ignore some of the values because I got this from Daedal's post
In your schematic it looks like your using (2) 1 ohm resistors in parallel, which doesn't give you the 10 ohms you need. (2) 1 ohm resistors in parallel will give you .5 ohms. You only need (1) 10 ohm resistor (buy them at radioshack).
The reason for this is because the resistors after the pot sets the limit for the current. I think you included the 100 ohm pot resistor in your calculations. It's just to adjust the current so it's neglible in your calculations.
Put the test load where the laser diode would be and measure the current on the test load resistor.
If this doesn't help here is a website I think will help you better: *Laser driver - It can be done*