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803T help

wesdaman14

wesdaman14

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ok im going to purchase a 803t diode.
i have a host heat sink all the stuff,but a diode and driver. i want the laser to have at least 120mw.
what driver should i get thats adjustable output?
and what is the mA to mw ratio ?? Thanks
 





For a driver go with a rkcstr driver, for ease of use I would get a fixed driver instead of an adjustable one, his site is http://rkcstr.googlepages.com/lpf
If you want 120mW go with the 150mA driver. I wouldn't go much higher than unless you want to risk diode life.
There isn't a mW:mA ratio because the diode's power in to output isn't linear. For a good representation of power look at dr.lava's and Zom-B's graphs.
 
styropyro said:
If you want 120mW go with the 150mA driver. I wouldn't go much higher than unless you want to risk diode life.
Click to expand...


Four months ago people on this list were saying the very same thing about the magical 100mA barrier. I drive these well beyond this regularly and very successfully.

Peace,
dave
 
You can get the adjustable driver too, just buy one of those dummy loads that rckstr offers on his site as well and measure the mA.

Hehe, I just turned up the power on my Kryton PHR-803T a smidgen and it is a bit brighter.
 
Where do i find those graphs at ?? also i just bought a 803T assembled modual with a driver set at 170mA. how long should i run it ? and how long will it last ?
ill only use it about 10mins a day.and my heat sink is going to be about 4 washers put together.
 
Make sure you have it well heatsinked and it should be okay. Still, it varies from diode to diode. I think danguin even accidentally drove his at a full 300mA or so and it didn't blow it out; though I'm sure it didn't help its life expectancy.
 
Go to Rkcstr's sales page, mentioned in his FS thread about the drivers. All the info you need will be in there:)
 
Wesdaman14 said:
what is a dummy load, or test load ??
Click to expand...
A dummy load is used instead of the diode to adjust the current going out of the driver.. So you don't accidentally blow the diode.
 
Hi

I also have a question about the Rkcstr driver. Because my blue-ray diode arrived today and I didn't have the driver yet. But I did have a spare 400mA Rkcstr driver and some spare SMD resistors.

I wanted to drive my diode as close as possible to 100mA, And Rkcstr uses 2x 25.5Ohm resistors for that. But I didn't have these. What i did have where 2x 22 Ohm SMD resistors. So i calculated the following things:

2x25.5 Resistor in parallel = 1/Rv=1/25.5+1/25.5 = 12,75 Ohm
2x22 Resistor in parallel = 1/Rv=1/22+1/22 = 11 Ohm

Then I wasn't sure how to calculate the current for 11 Ohm so I did it the following way

(150mA) 3x 22.5 Resistor in parallel = 1/Rv=1/25.5+1/25.5+1/25.5 = 8.5 Ohm

12.75-8.5 = 4.25
150-100 = 50

So 50/4.25 = 11,76 mA increase per 1 Ohm decrease ( Does it make sense?)

So 11 Ohm would give me: 100+1,75*11.76 = 120,58mA ( Correct? )

I'm not really sure if this is the right way to calculate the current so that's why I'm asking. And 120 mA is a pretty safe current for a 803-t right?

Thanks, Yoeri
 
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