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FrozenGate by Avery

Daedal Driver with Blueray?

B

BeavRat

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I have this driver for my red laser. I input 6 volts and 2.8 volts come out the other side with adjustable mA. In what way do I need to change this so it works with a prh diode?

Thanks
 





You need more input voltage. The diode takes 5 volts, and the LM317T driver takes 3 volts. That's 8 volts minimum.
 
So with 9 volts of power, how much would I be getting at the end of the curcuit?
 
If you want it to last more than 20-30 hours, keep it BELOW 100mA. I keep all mine at 75mA. There's a lot of hype about PHRs, but the bottom line is they're only reliable up to about 60-70mW. Above that, and you're looking at imminent failure.
 
I can see the beams on all of mine with no fog or smoke, provided the room is dark. I can even see them clearly outdoors at night, although they are nowhere near as bright as a green. Believe me, there's absolutely nothing wrong with a 60mW Blu-ray, especially for the prices people are paying on here. Today I bought two PHRs for $11.50 each. If you get greedy and demand 130mA out of your diode, you'll always be sacrificing its lifetime in return. Laser diodes are manufacture to last 10,000 hours or more typically.

On the other hand, at $11.50 a pop, it's not like they're hard to replace, so if you don't mind having to replace the diode frequently then you can run at at 3A if you want. Should be a pretty nice little explosion of multi-colored light as the diode melts.. [smiley=evil.gif]
 
ElektroFreak said:
On the other hand, at $11.50 a pop, it's not like they're hard to replace, so if you don't mind having to replace the diode frequently then you can run at at 3A if you want. Should be a pretty nice little explosion of multi-colored light as the diode melts.. [smiley=evil.gif]
Click to expand...

When my diode goes LED, I'm going to send it off with a direct connection to a 9V!

-Mark
 
ElektroFreak said:
If you want it to last more than 20-30 hours, keep it BELOW 100mA. I keep all mine at 75mA. There's a lot of hype about PHRs, but the bottom line is they're only reliable up to about 60-70mW. Above that, and you're looking at imminent failure.
Click to expand...

I would have to disagree. :P If you have it heatsinked well enough, then it could last a long time at 110mA. Without a heatsink, stay below 100mA. But I really think it's worth the money buying a good heatsink, or if you're chep like me, just super glue some 12mm washers.
 
randomlugia said:
[quote author=ElektroFreak link=1228366500/0#7 date=1228450850]If you want it to last more than 20-30 hours, keep it BELOW 100mA. I keep all mine at 75mA. There's a lot of hype about PHRs, but the bottom line is they're only reliable up to about 60-70mW. Above that, and you're looking at imminent failure.
Click to expand...

I would have to disagree. :P If you have it heatsinked well enough, then it could last a long time at 110mA. Without a heatsink, stay below 100mA. But I really think it's worth the money buying a good heatsink, or if you're chep like me, just super glue some 12mm washers.[/quote]


I only use blu-ray diodes to build lab modules for laser display purposes, and I use these huge heatsinks from z-bolt.com: http://z-bolt.com/MODIIIbg-green-laser-module.html(they're listed under the three green modules..) PHR diodes will work at 110mA, but not for anywhere near their rated lifetime. They're supposed to last up to 10,000 hours. You'll never see anything like that over 75mA, and maybe even not then..
 
ElektroFreak said:
[quote author=randomlugia link=1228366500/0#13 date=1228608384][quote author=ElektroFreak link=1228366500/0#7 date=1228450850]If you want it to last more than 20-30 hours, keep it BELOW 100mA. I keep all mine at 75mA. There's a lot of hype about PHRs, but the bottom line is they're only reliable up to about 60-70mW. Above that, and you're looking at imminent failure.
Click to expand...

I would have to disagree. :P If you have it heatsinked well enough, then it could last a long time at 110mA. Without a heatsink, stay below 100mA. But I really think it's worth the money buying a good heatsink, or if you're chep like me, just super glue some 12mm washers.[/quote]


I only use blu-ray diodes to build lab modules for laser display purposes, and I use these huge heatsinks from z-bolt.com: http://z-bolt.com/MODIIIbg-green-laser-module.html(they're listed under the three green modules..) PHR diodes will work at 110mA, but not for anywhere near their rated lifetime. They're supposed to last up to 10,000 hours. You'll never see anything like that over 75mA, and maybe even not then.. [/quote]


None of the diodes we use last for their rated lifetime, Long open can diodes are a good example, most people drive these at 420mA , producing 270-300mW. Do you think they will last 10,000hrs ?

There are 180mW BRs driven at 170-200mA that use 803T diodes and they are still going strong. A good example are some of Daguins BRs , they have lasted months.

-Adam
 
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