Recent content by Mrnewbie

(If one had a 100mw laser..but focused to a 120inch beam at 100ft, would it be dangerous to look at from 100ft? 100mw/120in=.833mw per inch I'm thinking the human eyes ..about 1 in wide would only be exposed to .833mw...each eye) You know guys, I think the above thinking is flawed. Some of...

I was more concerned about understanding the math end of things. The theory and reasoning behind it.

Ok, well we figure it not a good thing, but you won't be joining the land of the blind. .83mw exposure...and all exposure to be avoided. Next question, same senario 100mw,120" beam, 100ft. This time its you..your pointing twards a wall 100ft away, throwing a pretty 120" RED or Blue laser at...

We all know that Lasers are dangerous gadgets. So I have a hypothetical question on how it all works. If we all go back to when we were kids with a magnifying glass, we know the light beem has to be focused pinpoint beam to burn that ant! We know a 100mw laser when pinpoint focused is more...

I agree there is a danger aspect. Its best for wide open field shooting. I would not want to walk through the woods at night, getting invisible bounce back, off every tree or branch I walked by. Thats time for the LED.

You have 6 million post and I only have 10.. However I disagree, they are 2 diff animals that serve 2 diff purposes. I made one of the famous Lardy Lights..with a 50mm aspherical lens. It uses the osram/ostar power house 1amp sucking led..Its a great big heavy beast housed in a big old...

plugs into 12v 6800ma battery..as does the camera and screen...

OK, but I don't know what you expect to see. Cheap 3 dollar 9 led flashlight from gas station as housing. 4 dollar Ebay laser housing..I needed the front end lens to focus...but I focused wide 9 dollar ebay 500mw ld...580ma, I'm throwing 620ma at it. Bunch of pennies used for a heat sink Used...

Just thought I would drop in and say. THANKS GUYS ! After a few dumb newbie questions and a little help from some of you guys, I was able to put together just the laser I was looking for. Unlike most, I was not interested in a ligh show..or burning a match stick. I wanted a laser designator...

Yea, I know. But when its mounted of the far end of a gun pointed at a field or objects 50-75 yards plus..in a 5 Ft wide dispersed beam. I'm really figured it was nothing to be worried about it. Should I be? I am looking through a scope and camera and screen system. Should I worry about...

Thanks guys for your help so far. I have built a couple LM317 based drivers, and have a couple units working. Unlike most here, this setup is not for a focused burning, but rather for a wide beam night illumination hunting system.IR all the way. you guys have me so worried about the dangers of...

Ok, minor circuit changed again... LED (guess at 20ma) over Vin+ 12v with a 560ohm resistor. Looks fine. My reason for wanting to keep the cap, is my setup is just a little diff. I don't have a 100ohm pot. Instead, I put a switch in to switch another 10ohms in parallel. So I just have a low...

Thanks all, I have went with the dual 317's, and a few diodes on both the + and the - to drop the voltage ..don't recall but I think I added about 6 4001's. Also used about 5 pre 1982 (REAL COPPER) pennies for heat sink. Seems to take about 10min to get warm, I think this will work out fine...

First off, thank you for your time. It works and works well, but I have a heat problem. The system is tied to 12Volts and the LM317 heats up, heats up to much. So, I am looking for ways to cut down the heat. I have come up with 2 solutions, but wanted to ask before I moved forward. solution 1...

Hello all, building my first laser. HOORAY ME! , Nice site you guys have here! I did not like using idea of using the little driver boards out of the laser pointers. Instead I figured it would be better and a little more educational to make one. This is the one I have settled on, I like...