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I had a gold 20SL model PSU, and then info on Sam's site was partially helpful. My "enables" all worked, but none of the mode switching or current/light monitoring pins appeared to work.

If the chip is scaled up, the doping gradient through the depletion region would result in a different diffusion current, and would in theory, result in a different Vf across the junction when forward biased. The current density would need to be scaled up as well, so the current supplied would...

Heck yeah. Its not like I would be good at their job. Seems like the term "times of terrorist risk" are padded down. They should be rather described as "matter of human life and human death". So yeah, please kick down my door. Shame on them if they moved on because no one answered the door.

The amplifier on the ipod touch v5 can source up to 57 mA peak into the 23 ohm earpods if the the signal goes as high as 1.3V peak.

Look up the LIN one wire interface - should work very well as the protocol described by BB. LIN can sometimes be implemented with a microcontroller's UART module.

Jordan, I suppose the Vf increase at lower temperature is due to there being less charge carriers available in the diode junction, requiring a slightly higher potential to overcome the internal voltage while maintaining current flow. What's the minimum and maximum Vf you've measured so far...

I don't like it. Just looking at those beamshots tells me its far far more than 3mw max. I saw those pictures and said "Oh dear oh oh my!" People will get hit with too much power as an inevitability. Just look at it! Any way to report the project on kickstarter? Selling a laser device...

"Hey we finally got it in the mail just the other day, it was nice doing business with you!" *Zoidberg smiles and waves to his miracles makers, then turns and limps back to his rental truck to take a multi-million dollar laser system home.

Just trying to clear of the air of information which isn't quite right... I'm picky like that. Sure, getting a high power/quality YAG beam to cut something is relatively easy! The journey will be in the design and construction of the high quality beam. There are numerous design parameters to...

The various methods to reach that spectrum is summarized here: Article on yellow and orange lasers - Encyclopedia of Laser Physics and Technology Sum frequency generation would be the common DPSS method you often see on this end of the budget pond. I think Mario Master repaired/re-aligned a...

Ryan, I think the Badger summed it up very nicely for you. Let me expand on it a little bit: You will want to go through an Algebra I class in the least, if you want to understand anything on allaboutcircuits.com Excelling in Algebra classes and trigonometry will greatly expand your ability to...

All these 808nm CNC applications you show are with fiber coupled beams. They are certainly not mounting the diode as well as aberration correction optics on the CNC head. The setup would be difficult to install, maintain, and control. It would have only a fixed focal length, and would be subject...

Some lite reading for you: The Big Green Thread (I'm gonna regret posting this in the morning))

"You need much more power for metal, the focal point of the laser must reach the melting point of the metal for the air or oxygen assist system to blow the molten material out of the cutting area." ^^ Yes. And it must be able to do so very quickly. This ensures the material surrounding the cut...

Hey there! Welcome to the Forum! You ask some good questions. Let me give them a go for you, eh? 1) Those diodes are "multimode, single emitter" devices. The little chips are just that, a diode. A PN junction of some kind made from some magic rocks that glow in a special way. They cost just...

Re: 488nm kits It generally better to not leave un-used IC pins floating. If its not going to be used, its usually better to leave it in one state where it cannot fluctuate and effectively be un-used. This usually means grounding the pin, but it depends on the IC entirely. :)

Hey nice work on that! It should have many years of service left on it. Just curious though, did you actually test it yet? Its a smooth voltage adjustment, no obscene "hops" between taps?

Thank you for that input guys - I appreciate it. This one's definitely being catered to employer. Wish me luck in finding more work as a student!

Ok. So. I've got an internship lined up for the summer. I'll be doing embedded systems programming/prototyping for Vishay R&D. But here's the deal: I've got to be applying for part time work again in the Fall. The research project at LANE was put on hold, so now I'm back to revising my resume...

Its not all in the total energy of the pulse, but also in how you deliver the pulse. Bandwidth, wave front intensity, pulse width, etc also play an important role. I would imagine that cell phone jamming is far worse in the eyes of the FCC compared to a general EMP.