Search results

In the video I saw, the vehicle received some nasty scorch marks on its hood totaling a few square inches. :eek: Video of Airborne Tactical Laser Hitting a Ground Target Is Not Very Satisfying - Airborne Military Laser - Gizmodo

I have one that does the same thing: red light out when driving the violet pin. It was like that when I extracted it from the sled. The sled was advertised as a reject, so I'm not surprised. Mine's definitely shorted/misconnected inside, though, as I've been very careful to solder to the correct...

My younger brother paid a ticket by sending an envelope filled with coins. Apparently he didn't count them very well before sending, or more likely the teller at the other end took some out spitefully, because when he appeared in court due to the warrant for not fully paying, the judge strongly...

I think the first one is a PBS, as you have to rotate the red and violet to achieve maximum transmission/reflection.

Actually Manuel's analogy was spot on. It was so clear and concise that even someone with the mentality of a 12 year old could get it. I wasn't going to get personal, but after your attacks on him, I'll voice my opinion. I think you've shown people who you are and what you know here in this...

Common sense says: 100 mw at 100% duty cycle (i.e. CW operation at max spec) is significantly more power and visibility than 180 mw at 40% duty cycle (i.e. pulsed operation at max spec.) Data sheets have to do with a components actual characteristics and limits, and are independent of the end...

Two 8x's and a PBS could do that.

Correct. Average power is what matters for percieved brightness and electrical tape burning abilities. PHRs and the other LDs we typically play with, even if driven at optimum pulsed conditions, will not deliver a higher average power than when driven CW. Nor will they have a significantly...

Yes, the power rating for pulsed operation is often close to double the CW power, but that's the peak power. You can't forget about the duty cycle, which is often something like 40% for pulsed operation. So that means if you're going to run your diode pulsed at 100 MHz, you can run it at 180 mw...

Actually 25 MHz is 40 ns pulse width. 100 MHz is 10 ns. I have a dimmer switch in the living room with an LED that turns on/off at 60 Hz. When I'm still and I look at it I don't see any flickering, but if I move my head or walk across the room, the flicker is quite clear even though it's double...

I'm still not buying the better beam visibility due to pulsed driving (with higher peak power, but lower average power). Things that can happen on the time frame of one pulse, such as burning bits on a disc, or your TV sensing the IR signal from a remote I suppose, can benefit from the higher...

Maybe I'm missing something here, but I don't see how driving your LD with pulses will give you a brighter or more powerful beam overall than CW operation. I think people are misinterpreting the LD specs for CW power and pulsed power. For instance, on the senkat datasheet...

Cool! I imagine getting its legs out must be like a one-handed no-toothed man taking off a glove.

Do you have any methods for doing vias/holes with plating on the walls?

I use ExpressPCB and like them. They have their own software that's free and easy to learn. I think the files it generates are only usable with their service, though. As lasersbee mentioned, Gerber files are the standard for PCB manufacturers. Eagle is one of the best software packages, and they...

I worked at a semiconductor place and they went through tons of tungsten. Used blocks of it ~4"x3"x2" for making arc chambers and rods for many other things. They were always struggling to find cheaper sources for the material. Tungsten, like many metals, has a market price that fluctuates, but...

The link worked for me. It was this picture:

A PBS cube will take an unpolarized beam in one side and will split it into two polarized beams; one vertical and one horizontal. If you take two polarized beams (which the blu-rays and reds typically are) and go the other way, you can shine them into two faces of the cube and they'll come out...

Shine your violet laser through a prism and see what comes out the other side. It'll be a single line of violet. Or you can use a real diffraction grating instead of a CD.

Sometimes you do something just for the fun of it. Like this: http://www.thinkgeek.com/geektoys/japanfan/9c89/