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Old 01-06-2014, 03:48 PM #1
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Question Robust laser driver for labby.

Hey guys, i need something to power my M140 for LONG periods of time and i am worried about using an X-boost lol

So, i was wondering where i could get something like this:

(This driver includes a Fan output and is 2" x 3")
That will not get hot after continuous use.

TTL/Analog esp modulation is WANTED but not needed.

My size limit is 3" x 5"

Thanks guys! Great help!

-Matt


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Old 01-06-2014, 04:04 PM #2
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Default Re: Robust laser driver for labby.

FlexMod P3 Laser Driver [FlexMod P3] - $35.99 : Illumination Supply, Quality Flashlights and More!

Heat sink as desired.
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Old 01-06-2014, 04:26 PM #3
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Default Re: Robust laser driver for labby.

How does this driver perform for long periods of time?
Can i use a 2.5A 5v DC power supply to drive this?

Can it be operated for hours (2-12 hours) at a time?

What about the Die4Drive? Are those still around?

Thanks
-Matt
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Old 01-06-2014, 05:11 PM #4
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Default Re: Robust laser driver for labby.

the flexmods work great as long as you properly heat sink them.

input voltage requirements are are based on the voltage drop of the diode.. so that depends on the diode you're using. you may need to use a 12v PSU.


Quote:
Originally Posted by KRNAZNBOY View Post
How does this driver perform for long periods of time?
Can i use a 2.5A 5v DC power supply to drive this?

Can it be operated for hours (2-12 hours) at a time?

What about the Die4Drive? Are those still around?

Thanks
-Matt
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Old 01-06-2014, 05:41 PM #5
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Default Re: Robust laser driver for labby.

Quote:
Originally Posted by swamidog View Post
the flexmods work great as long as you properly heat sink them.

input voltage requirements are are based on the voltage drop of the diode.. so that depends on the diode you're using. you may need to use a 12v PSU.
Ah i see. Thing is, i dont know any of that XD

The voltage supplied says Vin - 1.5 so the driver uses 1.5 volts. So all i need to know is what is the operating voltage for a M140 diode?

Which components besides the regulator would i have to heatsink?

ALSO any word on the Die4Drives by Die4laser? These look good and have ttl mod.

Thanks
-Matt
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Last edited by KRNAZNBOY; 01-06-2014 at 05:43 PM.
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Old 01-06-2014, 07:57 PM #6
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Default Re: Robust laser driver for labby.

The driver in your pic also has a bunch of other wires going to laser head. Perhaps a fan controller, temp sensor, tec power, etc., depending on the features of your laser.

What's wrong with the original driver? Or is it that you built a head and just need a driver for it? If all you need is a stable current source, then yeah, go for that flexmod and choose a power source with enough voltage to drive the flexmod + your laser diode.

To know the voltage of your laser diode, you need to put the desired amount of current through it and see with a multimeter how much voltage the diode drops. A less precise method would be to consult the datasheet or other users' data to see what other diodes' Vf is at your desired current.

You would need to do this for Die4Drive too, it appears to be a linear current regulator.

Also, if you need output power to be stable, you will need optical feedback. If you just need to drive the laser with stable current, be mindful that temperature can effect efficacy and your laser power output may drift as the heatsink stabilizes.
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