Model of the heat sink - top
Model of the heat sink - bottom (with space for up to four drivers)
Heatsink in the making... (photo used with kind permission + heatsink co-planned and made by a contributor who wants to stay anonymous, and whom I am enormously grateful!)
Heatsink ready, mounted into underwater torch housing (photo used with kind permission + heatsink co-planned and made by a contributor who wants to stay anonymous, and whom I am enormously grateful!)
Heatsink, top view
Heatsink, bottom view
Modular underwater torch system from www.tillytec.de
Head of the TillyTec underwater torch with custom-made heatsink
"Remora" (mode switch) and two "Blue Sharks" (step-up converter LED drivers) see http://theledguy.chainreactionweb.com/product_info.php?products_id=988 and http://theledguy.chainreactionweb.com/product_info.php?products_id=1136
First attempt at a protective circuit against total battery discharge - at first, it did not work as expected at all, but after changing two resistors, it worked like a charm!
Same protective circuit against total battery discharge, only much smaller. It may not be perfect, especially as far as temperature drift is concerned, but it's about taking up all the space that is left inside the lamp, a more sophisticated circuit would not fit.
Same protective circuit, only much smaller still, because the previous one was still too big; in a 10 V version (left) and in an 11 V version (right). In the background a piezo-buzzer with a blinking LED in series, which gives a pulsed alarm tone (this does not work with all piezo buzzers, it depends on their internal electronics!).
The warner for low battery voltage will produce a pulsed tone when the battery's voltage is between 11.0 V and 10.4 V, and a continuous tone when the voltage is below 10.4 V (not very loud, I'm afraid, but better than no protection at all)
Nichia NC4U133A ultraviolet LEDs (365 nm), rank P8d33aM, for testing (and for another torch, in the future)
Nichia NC4U133A ultraviolet LEDs (365 nm), rank P8d33aM
Nichia NC4U133A ultraviolet LEDs (365 nm), rank P9d31aM
Mounting the LEDs...
Done glueing the LEDs to the heatsink (using Arctic Silver Thermal Adhesive)
Making the wiring (with some inoperative converter boards)...
Done with the wiring of the LEDs
Testing (with some inoperative converter boards)...
Final stages...
Done!
Welder's protective goggles (level 5) for testing... With them, the lit UV LEDs only appear as dim yellow spots. (Maybe these goggles would work great instead of the NightSea mask filters, too?! :-) )
One of the possible configurations of my camera system with lamps
Biofluorescent Night Dive - República Dominicana, Bayahibe (La Romana), Park Reef (Isla Saona) Bio-fluorescence night dive with self-made ultra-violet lamp (4x Nichia UV LED NC4U133A @ 365 nm + 2x Blue Shark step-up converter, ca. 46W, radiant flux ca. 6.5W) & Nikon Coolpix P300 camera with Ikelite housing, 15-Jan-2012 Aventura - Quando Volverás Michel Teló - Ai Se Eu Te Pego Elba Ramalho - Devora-me outra vez (Ven devorame otra vez) Pedro Almodovar - La Vida Es Un Carnaval
