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Be careful with those buck regulators from china, some of them throw massive spikes under certain conditions. Cant remember which one, but I do believe it was the lm2596 based that were doing it, and it was during power up even after a safe current was set. Some experimentation with a dummy...

The ShoWWx RGB laser pico projectors make brown. Im not sure what levels and wavelength make this color though.

Damn that is crazy footageo_O

Well the first thing I would consider is the output rating. China sellers and possibly manufacturers love to tally up the power input values and add them to the laser output for a grand total of BS. Im afraid there may be only one way to find out what the actual specs are, and that involves the...

I did some reading last night regarding wavelength. Seems up around the 1000nm mark, it can induce clotting of blood. Id be cautious of class 4 systems in the NIR range. Again, im not a doctor, I dont even play one on TV... but some real caution should be exercised with use of such...

The laser based therapies which i've read about typically use class 3b laser. This is also known as "cold laser". Though im no doctor, I do know that IR and reds penetrate deep, as for their effect on tissues, you'd have to research the available studies. I know its used in sports medicine...

Its all about the wavelength and concentration of energy. Not to mention that the emission point probably throws like a flashlight. Red and into infrared make your finger glow as an example, but this will not happen with green, blue, or violet. Try that with 30W of 405 and the results would be...

Why are these sets from china showing three lenses opposed to the two im used to seeing? Any ideas on the difference...

mine was a two hander and used 3x 12v 7ah wetcells to make that 1mW. It really was quite ridiculous. But it worked!! lol

Damn thats a sweet looking setup. Very nice work 🤯 edit. whered you get the waveplate?

This is very true.

Then make your own. Best way to save $$$

My first diy portable was a he\ne. Thing was a monster, and 1mW :ROFLMAO:

I have proper certified eyewear, most importantly I know how to put them on (y)

Sure, why not... Maybe bonus points if it is a pointer :giggle:

Thought i'd post a pic of my very first pointer that got me hooked on this rewarding hobby. I personally have learned so much which I otherwise may have not. So this thread is for those who remember that very expensive 1-5mW you could never put down. Heres mine, got the pic from a really...

Im just using it for engravings on wood cutting boards etc. More experimenting with than anything, so i'll be trying some diy setups.

Yeah I looked at those, but I'm going to try a cylindrical pair first.

I plan on upgrading my engraver and bought nubmo8's on ebay but the china seller sent near fully spent diodes, so im waiting on a block of new ones at the moment. Hope this batch are within spec.

You could also bring your own O2 reserve. Its an amazing view at that height, not sure if I could handle it. Maybe 20 years ago o_O