About the article

LED’s Dive!

Underwater torch using Luxeon LEDs

LED’s Dive!

It can often be fairly dark under water, especially at greater depths. A diving torch is essential if you want to be able to enjoy the marine scenery (or to help with a rescue operation). It’s easy to go out and buy a new lamp, but an old one still has its uses too! More so if we add some powerful LEDs.

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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Component list


R1,R2 = 6Ω8

R3,R4 = 8Ω2

R5 = 1kΩ5


C1,C2 = 1000(F 25V radial


L1 = 100(H (C&D Technologies type 1410478C)


D1 = MUR420

D2 = zener diode 8V2

D3 = BAT82

IC1 = LT1070

D4-D10 = Luxeon Star 3W LXLH-LW3C


7 x collimator lens, 15º, Carclo part # 10003/15

7 x lens holder, Carclo part # 10043

PCB, ref. 070011-1 from www.thePCBShop.com

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