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The idea to this came from looking at my random stuff and a strong desire for a beam expander(MAN THEY ARE AWESOME!), and after seeing some other diy expanders I decided to have a go myself with the parts I had on hand... which isnt much. There's no fancy 50 dollar lens sets here, just crap from...

This is my direct drive PT54 flashlight which I finally got to building after having the led sit around for quite a while and I have to say, its a BEAST! Although the PT 54 is pretty old now compared to the quickly advancing Cree LED's it still pumps out the lumens, only problem is heat... the...

It has taken me 4 crap multimeters to realize that cheap ones are kinda terrible. 1st meter I had was a 5 dollar pocket meter, it overestimated voltage, not drastically, but sill inaccurate. For some fun I tried to kill it by measuring the max current from a drill battery, maxed out at 90 amps...

Strangely I cannot focus on the dot of a 445, which people say is a trait of 405, 445 looks mega purple too me and the dot is much dimmer than my probably 100mW greenie. Also, I cannot focus on THIS and have to highlight it to read it. Is this abnormal? If you are going to say eye damage its...

Ok so i have some trustfire flame 18650's, I got them off dx and the reviews say they are legit, I have never even fully discharged one with quite a lot of use. So in anticipation for a phlatlight build (those things can take 9 amps :O) I took the protection circuit off and being way too clumsy...

Since its my birthday I thought it would be a good time to solder up my diodes for my 635 build. Sadly the Laser gods were not forgiving. The laser gods wanted to punish me for using a 60w iron on a poor 300mw mitsu. The diode failed to work @ 400ma, so I cranked the driver to 1.1a, the diode...

My order from dealextreme finally came in the mail, more than 40 days after it was posted, but I cant complain since their prices are so low. So here it is. The module is a 200mw from laserlands and I have to say, it might actually be close to its rated output power. With this module on 4.2v...

I've been interested in lasers ever since (You will eat me for this) I saw a YouTube videos from kipkay about lasers. I will not state the video because he does not deserve free publicity. That however was in 2008, and I've been learning from mainly these forums ever since. Now at the time I...

I've been lurking these forums for years and years without an account. Learning about safety, electronics and the physics behind how lasers work. I want to import a high power 532 laser module from eBay, this one in particular: HERE I also want to import host like this HOST Id say I'm more...