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Sorry, I know it's been said just wanted to reiterate it. I don't think he's confused about how to run a business/treat his customers - just doesn't care.

Yeah...even if you were moving, no one is stopping you from putting your site down for a little bit. Anyway, it's not like his service is slow - it's nonexistent, he just literally steals. Oh well

good call.... had easiest transaction ever w/ Jeff

Honestly, I'm not particularly interested in speaking to him. I was purchasing on behalf of a rather large academic research lab - with a potential to purchase a significant amount more than an individual user. If he doesn't have the decency or business sense to deliver a product paid for in...

Rather disappointed in google wallet, to be honest. You should cut a site off as soon as 90% of the customers are requesting full refund. Pretty sloppy. Reported him to the BBB just for the heck of it.

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.

Yeah I had six diodes(.7v drop/each) + 1 ohm resistor (5W because i had one laying around) -- I'll see at the lab tomorrow if I can get a screenshot, shouldn't be a problem but that driver is soldered directly to diode now, I'll see if it's reproducible on the other drivers (if not i should...

Yeah, inductor in series - what I wrote was wrong. Measured the spike using an oscilliscope - spike is clearly there based on LD output too though. If I just hold it in front of a power meter and flip it on I get Overload message then a second later a reading (overload isn't because it's...

Thanks! Yeah my eyes weren't hurt, just paranoia. I will say wearing the goggles for a long period of time causes my eyes to feel tired -- like if you were reading small font on a computer screen. Not like pain really but just a little tired at the end of the day. I ended up just turning the...

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...

Well, if I used a fluorescent sticky note that IS protected by my goggles then I won't be able to see it anyway, so it doesn't help too much. The fluoresecence isn't coherent so I don't think it is actually too dangerous to look at, but I'd like confirmation of that.

I can't connect them due to design constraints. The fiber is also collecting the signal emitted from the fluorescing tissue sample which goes through a separate path. Using a dichroic mirror, the excitation light goes through a different path than the emitted light. Anyway, the point is, the...

Sorry my question about the IR was dumb, I had just read something and wasn't thinking clearly. I'm actually sick and I'm pretty sure that is why my eye is bothering me. I have seen the dot a couple of times but only at low power (around 10 mW). I'm using the micro flex v5 driver and have...

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...

You guys can buy an 18650 4.35 V battery and a battery holder(like $.50 on ebay) and build a charge circuit yourself. They're not very difficult to build, just don't charge at a ridiculous rate, please.

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...

Thanks. I need to use 445 nm due to the excitation peak of my flourophor, I'd lose a lot of signal moving to 405. I'll check out the driver though, thanks! ben

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...