Search results

Got this green 303 ebay laser just for the fun of it. I'm not in cooperation with this guy, but his lasers are proving to be pretty reliable for ebay. At first I thought it was junk, (it was 12mw) but then I played around with it and found that after 2 minutes (it was cold in my house) it began...

Now that I think about it, it was probably my 660nm 90mw ebay <5mw pointer

Set up a 250mA LM317, and yep it's officially dead. Gentlemen, I present to you, A MONUMENT TO THE AGES! I measured the current and voltage given by the driver from 5 and 6 3A diodes (both close to dropping 4.6v) since I assumed an M140 would need 4.6v at the assumed amperage since I don't...

Hmmm I've got some 3A diodes. I'll test it later. Thank you for all that info DTR, and I had never considered it could still be alive. Additional info: I've built 2 700mW Oclaro C6's on 1.25A drivers from SL, and both of them made whining sounds after turning them on, just like charging up the...

Hey there. I decided to put together a 2W laser since I had never witnessed 2W before. I got a C6 host with a copper heatsink and 1.86A driver from Survival Laser and an M140 from DTR. Spent a couple hours putting it together. I turned it on and I didn't notice it being much brighter than my...

Actually, the Osram PL-series diodes are only 4.6% efficient at 100mA (28mW [DTR]), but I measured 340mA from an ammeter connecting the batteries to the body. That usually works when measuring laser pointer current pull, but this one acts funky, like it works on some sort of logic circuit that...

Just sent an email to laserbtb@hotmail.com. I hope action is taken asap

Nice. Thanks for the maths

At 3.0v, the driver pulls 0.05A. It doesn’t change in temperature significantly over 5 minutes. Beam size at aperture was (4x3)mm. I don’t have a range finder, so this will be woefully inaccurate, but at approximately 27m, the beam size was (35x30)mm, giving a divergence of 1.1mRad via the...

I don’t have a lab-type power supply, so I chose my freshest 18650 battery based on the thevenin resistance over the whole circuit where E=4.11v and I=0.37A => R=11.11ohms. Then I charged the battery and got that E=4.19v and I=0.38A then R=11.02ohms. Then tested the power and temperature (each...

[Generating science. Please wait - 100%] [Encountered error 1385 - "no range finder"] [Please wait for system to find a solution] [Complete. Have a nice day!]

;P at least he was the only responsible one who understood how powerful it was. When I showed my father-in-law-to-be, he wanted one to put on a rifle. I asked dennyzhaogoods if he had a less powerful one, and he said: Thank you contact me. I search the message between us and here's what i said...

Yep. Anyone know any way at all that we can show him how wrong he's acting? Could we spam his youtube videos with laser safety info comments?

I want to support this ebay seller, because dennyzhaogoods actually knows how his products work, and he's a pretty cool guy; just assuming he's a guy When I sold my first item on ebay, they sent me a spin the wheel game of chance to win 5, 10, or 15 USD in ebay credit. So I used my $10 credit...

And here's a really shocking one! No words describe how mad I am. Is this what regular Joes do when they get such lasers? Is this the SKY Laser we knew from Laserbtb? Just. Sick.

Mine used to also act like an LED when the laser was armed, but for whatever reason, it stopped doing it. It seems to have resolved itself. I was running it on 1.5v batteries, but then used 1.2v NiMH's, with which it did not exhibit the behavior. I just recently switched back to 1.5v's for an...

I was surprised to see there wasn't a complete review of AtlasNova's laser pointer, as this is my favorite safe laser that I ever had. I got mine a little more than 2 years ago on Amazon for about $20 (US). It fits well in any pocket. A nice thing about it is the pocket clip. On the rubberized...

I'm not trying to argue against the points you've made. I'm just trying to approach this scientifically. I did not say that the lack of an ESD bag killed it. I stated the facts: that it died due to shipping and that it worked for about one year. I'm not trying to give a persuasive speech. Just...

I just got an LPM a couple days ago. Yes, I was completely wrong about the 1.2v batteries. I went to 4:30ish minutes, but it was getting pretty warm so I stopped. 38.1mW max. Seems to exhibit a form of thermal runaway. You can tell that it wants to be 25mw, but as its temperature increases it...

But it was working for a whole year under my care, and I exposed it to mechanical vibrations, moisture, and extreme Chicago temperatures in my car. I feel like I should investigate into the probable causes of death. But until then, my original post does not hold water.