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505nm and 480nm diode RESULTS

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ZRaffleticket

ZRaffleticket

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I already have a few of these on the way from odicforce. The ebay listing is a bit cheaper for those of us in the States.
 
paul1598419

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I hate it when a seller of an adjustable driver doesn't give you the current limits. It makes me think they are hiding something when they just say it will work for a certain power diode. That tells me nothing I need to know.

Edit: If you try to use this with one of the diodes that is case positive, it will be the end of both driver and diode if you don't isolate the diode from the host.
 
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10fenny

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They prolly couldn't give you the current limits for they prolly vary too much. I've had that issue a few times with cheaper drivers that did show a range.
Bit ide like to see these things on a scope. Could be promising for the price.
 
paul1598419

paul1598419

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That thing goes for ~$7.99 IIRC. I guess I could order one and set it up on one of my dummy loads and check it out. It would take about 15 days to get here. Hmm?

Okay, give me the link and I'll do it.

Never mind. I just ordered one. It should get here by the 16th unless they screw around and don't ship it out right away.
 
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paul1598419

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Is that the rated maximum, or a suggested supply voltage? It should be able to take 4.2 VDC, but I can't say that for certain. I guess if I can't find out, I'll start it out at 3 VDC. I have a great scope and can go through this driver with a fine toothed comb. Since they don't say what the current limits are, I suspect it is very narrow.
 
CurtisOliver

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I'm no driver expert but surely that is the starting voltage not the max. It would be useless for any li-ion builds otherwise. :thinking:
 
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paul1598419

paul1598419

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With these Chinese sellers it hard to tell. This is advertised as being used with laser tubes. Many sellers carry it, but the explanations are all the same. It's like none of the sellers have any idea how a laser diode driver even works.
 
10fenny

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Your probably right paul.. they only understand when sold they get money.
The build I saw with this driver was a pen build with two alk cells. I'll prolly go ahead and order one... cheap driver. Paul I hope you get some good testing on it.

Edit.. ordered one
 
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paul1598419

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I only ordered one because there seemed to be a lot of interest in it and I have all the test equipment to go through it and report back. I don't have a use for it presently and may never have. I'll let you know once I get mine and have had the time to go through it.
 
S

Singlemode Laser

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I received today two 505nm and one 476nm laser diode. I had only time to assembly one of the 505nm diodes into my mount and to turn it on. The color is amazing. During the next days I will run the diodes with different temperatures and currents to measure the WL shift. Finaly I will use a diffraction grating to force the diodes operate at 481nm and 497nm respectively.

Last week I did the same with the single mode 5,6mm 450nm Osram diode, and could achieve single mode operation over a range of +/-5nm away from the wavelength of the free running diode. I will post some date later this week. Is there something else somebody want's to been measured?

Singlemode
 
CurtisOliver

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Be careful not to push them too hard though Singlemode, but it seems you have already got it sussed. :beer:
 
paul1598419

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@ SingleMode
Do you know which of the three iterations of the 505nm diode you got? They have a number micro-printed around the diode's window that can be read with some magnification. They all start with SB.....
Depending on the one you got, it could be closer to 503nm or 510nm. That could make a difference if you are trying to get a specific WL out of it.
 
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