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I recently bought a 12 LED flashlight that takes 3 AAA batteries. You install the batteries by placing them into a cylindrical battery case, and slide that into the flashlight casing. What I would like to do is use one short battery (about 34mm or less in length, and about 24mm or less in...

I'd be surprised if I got any takers, but I thought I'd ask anyways. Here it goes: I am taking a speech class this semester, and would like to use a burning 405nm laser for my upcoming demonstration speech. I was going to use my PHR-803T laser, but it died on me recently. So my question is...

I'm selling my PHR-803T laser. Puts out somewhere around 100mw. Burns matches, balloons etc. The PHR-803T diode is in a Aixiz module with glass lens and Rkcstr driver. I have it on a 9 volt battery, and works great. I have turned it on very little, and each time has been for 20 seconds or less...

Would anything happen to the beam of a 150mw 405nm laser if it is pointed into the hole of a doughnut-shaped coil that is producing a magnetic field of about 900 Gauss? Would the beam be affected, and if so, how? Thanks in advance, Tim

Hi all, This Halloween, I would like to create a vortex/tunnel in the garage for the kids to see. I would be using a 5mw pen from eBay that I just bought. A fog machine would be used to help with the effect. My questions are: 1. Can the 5mw green eBay pens run continuously for 1.5 hours? I'm...

Hi all, I'm trying to replicate the 'Laser Communicator' project that can be seen on youtube and other internet sites. I bought all the necessary parts and followed all the schematics, and I still cannot get it to work.:cryyy: Here is what I am using: The Transmitting Side 1. 405 nm 100mw...

Hello everyone, For the past couple months, my interest in lasers has been growing...exponentially! Although a lot of the scientific details of lasers goes over my head, I still have learned quite a bit, and I find all of it fascinating. I recently bought a 405 nm Blu Ray laser from...