Driver reccomendation

[ultimatekaiser]

Looking for a driver that will output around 2.5V @ around 90mA typical.

Anyone have recommendations? gonna attempt to make use of a PS031-00 I have laying around.

Thanks in advance!

 

[NKO29]

Make a lm317 driver. No heatsinking required, VERY simple circuit if it is a 1.25A regulator all you will need is:
Lm317 1.25A regulator
About 13.8 ohm resistor.
All of this is easily bought and very cheap.
-Josh

 

[ultimatekaiser]

yeah I figured i might have to self make one, nothing available that runs in that area it seems. I'm not much of an electrical engineer so i'll have to do some research then only used pre-built drivers so far.

 

[djQUAN]

What's your power source? (voltage and current available)

 

[NKO29]

It's REALLY easy, you only need to solder 3 points

 

[ultimatekaiser]

I think I found a driver. but just to continue the thread for knowledge's sake:

looking to make a driver that inputs from probably 3-3.7 volts.
the diode is rated at 2.4V typical with an operating current of 90mA. threshold is 30mA...I don't have a ton of info to go on yet as i'm finding the paperwork that goes with it. I think i have a few of these with their papers sitting around in my basement. gonna dig it up and I'll get back to you guys. its late here so I won't do it till tomorrow.

If I remember correctly these are 30mW max and are stablized 680nm diodes. they're no longer produced as far as i'm aware, and contain an astigmatic lens to produce a cleaner beam with low divergence.

 

[SKeeZ]

yes use an LM317 circuit with 13.888888/14 ohms impedance.

 

[djQUAN]

An LM317 will not work in his application with only 0.6V dropout worst case (3V supply, 2.4V diode Vf)

Better options are the ready made LM358 based linear drivers used for pen lasers.

 

[AnthoT]

You would need a lower dropout then lm317. As djquan mentioned the lm348 would be better suited.

But if you want I have some low dropout linears. 13$ Adjustable from 60ma - 500 and 500 to 1Amp. Just drop me a PM if your interested

 

[NKO29]

if it were a l-ion battery you're using, a lm317 would be ok but like the others said 3v input will be too low.

 

[ultimatekaiser]

Ok. i'm still in the idea stage, so power source is still in the air. but thinking a single lithium would be preferrable, but I may go with 2 AAAs. probably will use a single lithium however. i've also found 1 pre-made driver that may suffice. found the paperwork for this diode and i'll be going over it later tonight after class.

 

[The Lightning Stalker]

The cheap drivers like the ones o-like sells should work.

Correction: sorry, they will not work down to 3.0V.

 

[foulmist]

instead of LM317 use LM117 or LM1117 it's the same schematic as LM317 with less dropout voltage. very easy to use! :wave:

 

[ultimatekaiser]

ok got the specs for this particular diode so there are no more questions. (after a lot of digging and finishing up my other project to help me settle on parts)

the company's specific tests came out as follows:

Ithres was 27.978mA
Iop was 72.51mA
Vf was 2.239V
and optical output was 30mW

I've settled on a 3.7V battery power source. I'll probably use an 18650 or 26650 battery host (long run times), so now all i need is a driver and a heatsink. Thanks for the suggestions! I've narrowed it down to a few drivers.