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I found a STORE on aliexpress.com SKYLasers - FDA Certified Power Guaranteed Laser Pointers - Small Orders Online Store, Hot Selling flashlight,Screwdriver,Auto and more on Aliexpress.com It says SKYLASERS and the pics carry skylasers watermark. Is it the same store or some copy?

Finally got it I think this should work HOST : Ultrafire C2 DIY Cree LED Flashlight Shell/Casing Complete Set with Driver Pill (1*18650/2*CR123A) - Free Shipping - DealExtreme Emitter XM-L 975-Lumen LED Emitter White Light Bulb (3.0~3.5V) - Free Shipping - DealExtreme Driver (2.8A) 3-Mode...

my bad. I misread the 9W part. Can you suggest a host and driver on dx.com I can chose for the XML LED running at 3A

So I have decided, my first "assembly" will be a flashlight. I am thinking of Cree XML-U6 or similar running 3A. This costs around 8$ on dx.com Along with that I am wondering which host I should use and which driver which will fit into the driver pill of the host. The problem with DX is that a...

Great! Similar to this. I was planning to have it powered by the vehicle 12V supply I guess, I can stick the cree XML-T6 type of high power LED on a aluminium plate, and stick the drivers to the reverse side. Enclose it in a simple fog lamp housing, and I am good to go!

There are many aliexpress sellers who sell just the tip set for 5-10$ depending upon number and type. Cap 6B01, a cap showing six effects, 100 pieces / lot, a rotatable cap, six beam shapes, diffraction grating, laser pointer-in Laser Pointers from Office & School Supplies on Aliexpress.com...

Yes, I am thinking of using 4 LEDs, and using 2 drivers(Each driver driving 2 LEDs). Found a 5-18V driver on dx.com which can drive three LEDs, so 2 should be okay. Will also buy acheap housing. Since there is no reflector, I presume this is going to be a proper Flood light!

Trawling through the search threads on the forum, I am now fairly confident of assembling a laser using a DTR module, a driver and a host from dealextreme. However, even though I have searched LPF and a lot of other forums, I am a little confused about how to make LED flashlights. Firstly the...

I don't think its a lunar ranging experiment. this is a astronomical laser to create a laser guide star http://en.wikipedia.org/wiki/Laser_guide_star

I guess San Francisco is....

LOL, no just a very long exposure. However long exposures do look line night when there is no moon

Camping under the full moon

How much time did seller take to ship this. I also got the same thing, and after 3 days he has given me tracking number. Now its 5 days since I got tracking number, but when I try to track it on china post, it says not found,

While going through the forum threads, its become clear that green DPSS modules do not function well at low temperatures. What about diodes(MT140 etc.,) Is there some kind of chart of temperature vs output. That said, at -20 degree C, your duty cycle should increase since the diode will have a...

Dear sir. Please put down whatever you are smoking and read the guide once atleast. Carbon Zinc has been covered. I mentioned that earlier also, but somehow you want to believe its not covered. So I am putting that in this post also There is post number 15 in this thread where I mention

I have covered Lipo. i.e. Lithium Polymer batteries

I have a rep of ~580 with less than 50 posts currently :). I guess I am doing good, eh?

Cypaagon I just realized that heat capacity of copper is much lower. So temperature of copper can be increased with application of much lower energy. Therefore even 1W laser can be measured to a reasonable accuracy. In reality my experiment may be totally crap outside the lab. However, why not...

Yes, there are a lot more. But I deliberatly ingnored those which are not used in flashlights and lasers and consumer electronics. So I covered Zinc Carbon, Alkaline and Lithium for non rechargeables. What I missed out is this http://en.wikipedia.org/wiki/Nine-volt_battery -> The Transistor...

It better be sound. After all the entire system of Thermo-Mechanical engineering has its basis in what Mr. Joule did! Mechanical Work <=> Heat Heat <=> Work The basis of all engines, heat pumps, exchangers and what not. Heck the Cg of water of a value of 4182 was calculated using this method...