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Dr. Lava received $60 from me over a month ago. No communication from him. Requested refund twice from google wallet and never got it. Really ridiculous, site needs to be shut down.

Hi All, I notice that when I turn on my driver by hitting a switch attached to my battery I get a transient voltage spike... this is bad for my application because I want the light output to be well controlled and a super bright spike at the beginning is very undesirable. Anyone have any...

Hi All recently set up a 445 nm laser system. I'm running it off of *relatively* low power (<100 mw) - in fact right now I have it set <10 mW. The problem i'm having is I need to visualize my beam, to focus it down to the proper spot size I need for a research application, but when I put my...

Hi All, this document http://prod.sandia.gov/techlib/access-control.cgi/2003/032100.pdf goes into good details on an ESD protection circuit. I know most of you don't experience problems with it, but if your circuit isn't going to be totally shielded it's something to consider. Also, I wouldn't...

Hi All, Great forum you have going here. I work on a portable microscope project as a graduate student and have previously used LEDs. However, due to changes in the microscope I get a big power drop from my optics to my fiber optic cable (due to a numerical aperture mismatch that can't be...

Hi All, I am using a laser for flourescent microscopy and have previously used only LEDs so I'm new to a lot of the technology here. I honestly don't really need all of the power that the current 455nm diodes offer, I'll probably be staying in the 50 to 200 mW range. That being said, I'm still...