505nm and 480nm diode RESULTS

Just barely. Payment processed though, it's not too much more plus I guarantee a 487nm.

Oh also. For the 505nm diodes... what is the pinout for the following:

What page or pages show the numbers? I started to go through them and saw there's 32 pages!!! Wow. Anyways I think I was able to read the numbers without optical assistance... 31 years young with good eyes... ish. Sb147ec91? That's the 505nm i got from dtr. Does this look right? Prolly not but close?

SB1473N91 is what I can tell. Too many pages to sift through on my phone right now. If nobody knows I'll dig a bit

Edit: got lucky - p22 says this one is the same as the OP, case neutral.

Yay I love case neutral... never paid attention to that in my first few builds couple years ago and must have gotten lucky. Dont know why i shared that slightly ebarassing fact.. but hey were all laserists here. Rep zr!!

Edit: I am almost certain my og numbers are correct... checked each digit multiple times

The SB1473N91s are case neutral, but the SB1573N91s are case positive. Don't get them confused.

Dammit ok I'll look again! I was half thinking building an obscure build for SELEM

I got my driver and found that with the Nano Boost driver the Vf is so high that to keep it regulating at 275 mA at a full charge it pulls 1.1 amps from a single Li-ion battery. As the voltage decreases it pulls even more current. At 45 seconds in, the chip and the inductor both get very warm. If the Vf were lower it doesn't need to pull so much current, but it is around 7.1 VDC. I don't see a good way to heat sink this driver or the IC, so I'm going to have to limit the run times for the sake of the driver. Just a heads up to those of you that have used this driver for this diode. Oh, BTW, the diode is the Sharp 473nm one.

Edit: I haven't yet done a build with the other Sharp diodes, but the Vf on them is pretty high too, so............

The different terminal connections for these 505nm diodes had me curious so I decided to do some digging

It turned out there are two different datasheets.

This datasheet is for the 505nm diodes from ebay (newgazer)







This datasheet is for the 505nm diodes from song song








By having a closer look at these two datasheets we can notice:

1) The first one does not have model number at the top of the page, suggesting it's a very early prototype and no model number has been assigned yet.

2) The first one has data for monitor current which is something not included in any of Sharp's final datasheets found on their website.

3) The second datasheet has a model number, yet it's obviously not final. It has been issued on February by the development department.

4) These are two iterations of this diode, the first iteration doing consistently 502-503nm so they had to tweak but the second iteration is doing 507-509nm. So far I had 12 diodes tested from the two batches and yet none of them hit exact 505nm. Most likely they are still under development stage and there will be final iteration of this diode.


This probably applies to the "480nm" diodes too, I think the ones we got is the first iteration as we have not seen any datasheet for them.

Dr.Laser said:

The different terminal connections for these 505nm diodes had me curious so I decided to do some digging

It turned out there are two different datasheets.

This datasheet is for the 505nm diodes from ebay (newgazer)

This datasheet is for the 505nm diodes from song song

By having a closer look at these two datasheets we can notice:

1) The first one does not have model number at the top of the page, suggesting it's a very early prototype and no model number has been assigned yet.

2) The first one has data for monitor current which is something not included in any of Sharp's final datasheets found on their website.

3) The second datasheet has a model number, yet it's obviously not final. It has been issued on February by the development department.

4) These are two iterations of this diode, the first iteration doing consistently 502-503nm so they had to tweak but the second iteration is doing 507-509nm. So far I had 12 diodes tested from the two batches and yet none of them hit exact 505nm. Most likely they are still under development stage and there will be final iteration of this diode.


This probably applies to the "480nm" diodes too, I think the ones we got is the first iteration as we have not seen any datasheet for them.

Click to expand...

Then, Dr. Laser, what's the pinout of the diode i'm going to buy from you??

Albert1007xd said:

Then, Dr. Laser, what's the pinout of the diode i'm going to buy from you??

Click to expand...

The one in the first data sheet (case positive).

Dr.Laser said:

The one in the first data sheet (case positive).

Click to expand...

Okay, thank you very much. Awaiting your PM.

@Dr. Laser; was wondering, are there any 480's and 505's that still need to go to a good home?

BobMc said:

@Dr. Laser; was wondering, are there any 480's and 505's that still need to go to a good home?

Click to expand...

All gone. Actually I didn't manage to get any of the 480's.

Dr.Laser said:

All gone. Actually I didn't manage to get any of the 480's.

Click to expand...

Ok thanks, maybe the next time around.

Anyone looking for that "last chance" 473nm diode might appreciate this: Sharp 5.6mm 473nm Laser diode 50mW | eBay

Not sure if it's anyone from the forum?

Not I. Though I am holding on to a spare for a few weeks in case the 480 kicks the bucket.

Also -- 502nm is finally running. It's still indisputably green in color.