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By the way, here is the schematic for the circuit I made.  Nothing fancy.

Good idea! Great! Would you mind sharing the Illustrator version when you get around to it? :)

Thanks for the feedback. I bought my first PHR DIY kit for under $30, but it was a proto-board with only 6 components or so. I wanted to make a nice printed circuit board with a tactile button and make it easier to assemble for the general public who may not be so technically inclined and just...

Hello, I'm fairly new to these forums but I've been reading them for a little while. I work in an optics lab at the University of Southern California and I just started getting into these Blu-Ray lasers. I was looking around for a good driver kit and noticed that most of the ones available on...

I recently made this label for a project I was working on because I couldn't find a good one online. It's a Photoshop file and you can use and edit it for your own purpose.

Not to mention that you probably won't be having the beam on continuously for minutes at a time. In only a few seconds, any metal the diode is touching will be happy to absorb a little more heat.

I recently attended a lecture by Dr. Hawking and I liked the explanation he gave on how black holes can evaporate and why mini black holes evaporate but larger ones usually don't. From quantum physics, if a particle is tightly defined to a position in space (like in a black hole), then its...

Nice batteries, thanks for the link. I wonder if they are only available online?

Did you actually measure the output current after building the circuit, not just using the simulation? That should be enough current (produces about 150 mW of optical power) but the other thing you might try is messing with the focus, even with an extra magnifying glass or something.

Or, let Google do the work: "12 degrees in radians" I sometimes use Google instead of my desktop calculator. haha.

Has anyone tried to mount the PHR-803T diode directly to a PCB on the edge or using some sort of mount? I'm not sure if there is quite enough space between the top and bottom leads of the package to just stick it right on the edge of a 1.5 mm thick PCB. Thanks, Ben

Hi Everyone, I'm fairly new to posting on these forums but I've been reading them for a little while. I work in an optics lab at the University of Southern California and I just started getting into the world of laser pointers... I had no idea there was such a huge community based around them...

Re: Re: What's the minimum mA needed to be a burne I tried to do this calculation and it turns out to be non-trivial! For example, take paper: Mass is about 100 grams per square meter Heat Capacity is about 1.4 Joules per gram per Kelvin Autoignition temperature is about 500 degrees Kelvin...

Haha I have to go try this now... still wondering how you "stumbled upon it" though. Haha.