Survival Laser NDG7475 Build

• May 23, 2014

• #1

Garoq

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Finally got around to finishing my first NDG7475 build the other night. Measured output was over 1.2W with a driver current of 2.2A. These diodes are not nearly as efficient as the 445nm diodes, and a small handheld laser gets hot pretty quickly. The beam however is truly amazing! :drool:

The build used the following:

• NDG7475 diode in copper module from DTR

• SL S4 host with extended and tapered copper heat sink

• SL 2.2A driver and pill module

• G-2 lens assembly with black anodized extended focusing ring

• External lens spring

• 2 x RCR123A/16340 batteries

• Silicone lens cap

Optional:

• Céramique 2 Thermal Compound

• Aluminum driver heat sink

• 2 x 18650 batteries

• Battery extension tube

Yeah it was expensive, but I had a good excuse because my wife wanted my 70mW PL520 build.

 

• May 23, 2014

• #2

BowtieGuy

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Very nice SL S4 build, and .....it can double as a handwarmer!
Sounds like you came out ok in the trade with your wife.

 

Last edited: May 23, 2014

• May 23, 2014

• #3

M

malick67

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Wish I could justify the cost. That looks really cool.

 

• May 23, 2014

• #4

Atomicrox

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Looking good. What's the duty cycle on the S4 host?

 

• May 23, 2014

• #5

Garoq

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Atomicrox said:

Looking good. What's the duty cycle on the S4 host?

Click to expand...

30, maybe 45 seconds on. I'm going to try and get a video tonight and make some more observations.

 

• May 24, 2014

• #6

dubious speculation

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That's just awesome! Looking forward to the video :beer:

 

• May 24, 2014

• #7

sinner

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Sweeet! Not many out there yet so its truly a gem :gj:

 

• May 24, 2014

• #8

IWIRE

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Great build ! I love builds that are on the edge of insanity. It's like stuffing a V-8 in a Volkswagen Beetle. There is absolutely no logical reason for it. Except because you can. People will look for hours to see how it was accomplished and say how crazy it is. Then say I sure would like to drive that thing. :crackup:
I for one completely understand why you did it and commend you. Thanks for sharing it !
That is awesome. REP +1 :beer:

 

• May 25, 2014

• #9

Garoq

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Thanks guys! Last night i was too tired to make the video, but hopefully later tonight. I just measured it again on my LB and it produced 1,241mW peak.