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Well congratulations ZRaffleticket! Did you intentionally put it in a larger host to give it infinite duty cycle? With it being such a gorgeous color I know if I had it I would not be able to turn it off :D.

I used the first pinout, the one I took from DTR. The case pin is the Anode (+) and the "top" pin was the cathode (-). So here is the data. Diode: SB1573N91 Pinout: posted above in post #450. Wavelength: 503nm +/- 1nm. λ vs. I: 0.1nm/mA At 120mA I compared it to my argon ion and get an...

The pinout is the same as the PLT5 515 so it is this. I can confirm that this is the right pinout for because this is the way I have my diode running right now. For the ebay listing I think the first image sketch is from the front instead of the back. ebay datasheet I actually first tested...

For the 505nm diodes? My 505nm diode only shifts approximately 1.1nm from 70mA to 160mA. So seeing as these don't shift much with current I'd think that they wouldn't shift much with temp (relative to other diodes). I'd think that they'd have similar wavelength shift with temperature as with the...

I'll probably set my "473nm" diode to 200mA since the wavelength does not increase beyond that. Also, my diode from Newgazer arrived tonight. So tomorrow I should be able to spectro it if I find time. I can confirm that the diode that arrived is indeed the SB1573N91

So I did manage to get get more data on the wavelength of my 473nm diode at different currents. And I got this graph... And of course it should be noted that the spectrometer's accuracy is +/- 1nm, I just included the last digit to give a better relative reading. The lasing threshold was at...

Once my "505nm" diodes from Newgazer arrive I can got some data on wavelength shift. Although, I don't think my diodes will arrive for another week. I'm curious what the numbers are for wavelength shift with current in the 473nm/480nm diodes (when properly heatsinked:D). Maybe I'll test that...

So I just fired up my 473nm diode I got from Zach. At threshold it was at around 473nm-474nm. When I did my wavelength measurements I forgot to heatsink the diode module. But I notice something interesting, at 100mA the spectrum split into two peaks, one at 475nm and another at 477nm, with...

Very nice build. I always enjoy seeing your builds, not only are they always very good quality but your presentation is also impeccable. I wish I had access to a nice lath... and the skills to use it as proficiently as you.:beer:

So we have: -SB147EC91 closer to 510nm? (DTR, Song, ZRaffleticket, Lazerman121 second batch) -SB1473N91 505nm diodes. (Lazerman121 first batch) -SB1497N91 505nm (Lifetime17) -SB1573N91 which may be 505nm if Dr.Laser's diode is representative. (Newgazer) I ordered one of the SB1573N91 and...

Re: My DIY laser projector project Oohh, I see, thanks for pointing that out. What would be the right terminology?:thinking: Anyways, so slight update: I got some 1" thick Al pieces for the diode mounts. I have quite a few parts and pieces on the way that I'm waiting for. Also, I'm going...

Looks like the ebay listings posted a picture of the diode face. Although all three listings are using the same picture, and uploaded them around 10 minutes apart. Also, I bought one from Newgazer:D, So when it arrives I'll spectro it. I wonder how many of the true 505nm diodes are out there?

Do you have access to a spectrometer?

Re: My DIY laser projector project Right. When the input signal is zero, the output current is zero. When the input signal is greater than zero the bias current will be on. Like this (Circuit Simulation Link)

Re: My DIY laser projector project That is a great point. The two op-amps basically act as an overly complicated voltage divider. I'll have to fix that. :thanks: I was trying to get the laser diode current to be zero with an signal input of zero, while still having the bias current on for all...

Re: My DIY laser projector project I know, I'm going to post this on PL soon. But you can't edit a post after a day or so there. So I figured I'd post it here and get my formatting and pictures set up. Plus if I get it sort of together before SELEM then I might get some more advice there too...

So I've though about building a laser projector for some time now, but I never got around to it. Plus it was slightly daunting to me with the various choices of DAC, Software and hardware. Well, for my college course I need to build a project, so I decided to get a two for one and get a laser...

Happy Birthday Len. I hope you have a great day!

Well, TBH, one reason is the minimum cost for an entry level system. That and some of the software/hardware paring can be complicating. I think you might find my current project I'm working on interesting (Since it might have something to do with a nearly totally DIY projector).

Congratulations on this milestone. :wave: They say that time flies when you're having fun. So here's to more fun times :beer:!