FlexMod P3 Help!

[premierlaser]

Hey guys!

I have received some flexmod p3s today, and i am driving 2 9mm 445nm diodes. Ive been having some trouble modulating the board and i think i may have fried it! I think i know what my problem is but i just want to be sure. Ive been using a 5volt transformer for the modulation and of course tied in the ground with the rest of the grounds on the board. When i applied the 5volts the output on the meter did increase and it did work for a bit before dying out. Once the module is built it will be ran with an ilda connector, and the modulation will be taken from their. So 2 questions...
- during the building process how can i adjust the modulation so i wont damage the diode or the driver, without using pangolin or an ilda connector.
- when i use the modules in my projector the signal for modulation coming from pangolin will be V+ to M+(on flexmod) and then to ground (on flexmod) do i connect the ground or V- from pangolin?

-Adam

[drlava]

Hi, first things first, you need a multimeter.

Next, you should to set the current on the driver before attaching to a diode.

Next, your power supply should be 1.5V greater than your diode voltage. If you're using blue diodes, that means 5.5V or greater if you are using single or parallel diodes, and 10V or greater for a series connected diode pair.

For modulation setup, you can safely connect the V+ to the modulation+ to enable full modulation.

For operational setup you should connect the V- of that color from your DAC to the gnd pin of the driver.

[DTR]

If you're using blue diodes, that means 5.5V or greater if you are using single or parallel diodes, and 10V or greater for a series connected diode pair.

Also keep in mind the 9mm 445's have a slightly greater forward voltage than the M140's around 5V+ so with a 1.5V droput 7V would probably be a better safe voltage overhead.

[premierlaser]

I had a multimeter set up connected to the output leads. I first set my standby current then un-shorted the M+ from ground. I then applied 5 volts for modulation and I got a much higher current reading, as I was adjusting the gain the board just seemed to fry. It then only out put around 70ma with or with out modulation. I'm not sure what I could have done to damage the board. I am using a 12vdc 4amp power supply.

-Adam

[polishedball]

Did you have the board properly heatsinked?

I had a multimeter set up connected to the output leads. I first set my standby current then un-shorted the M+ from ground. I then applied 5 volts for modulation and I got a much higher current reading, as I was adjusting the gain the board just seemed to fry. It then only out put around 70ma with or with out modulation. I'm not sure what I could have done to damage the board. I am using a 12vdc 4amp power supply.

-Adam