[PSUBS-MAILIST] LED Lights

[Alan James via Personal_Submersibles]

Ken,I am keen on the idea & have ordered a number of cheap led lights, torches &outdoor lights in past years, with view to making something up.Have had a surprizing number of failures with cheap led dive lights & torches,so something built of good components that is reliable would be great.I have posted this before, but there are a huge amount of lamps, reflectors, leds,lenses & o-rings on Deal Extreme. You have to hunt through the spares section.http://www.dx.com/c/lights-lighting-1399
I have been looking at bare alluminium housings that I can hard anodize. Maybejust cut an o-ring grove in & oil compensate by fitting a hose barb connector & plastic oil filled tubing around the wire run. This is how they do it on the "Dual Deep Worker".   I seem to remember them saying they used an oval plastic tube (could be wrong)but this would be in line with our previous thread on crush pressure of round plasticThis could be an interesting project.Thanks Alan

      From: Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org>
 To: 'Personal Submersibles General Discussion' <personal_submersibles at psubs.org> 
 Sent: Saturday, June 20, 2015 9:36 AM
 Subject: Re: [PSUBS-MAILIST] LED Lights
   
Hi Ken,  
Sounds great.
I have a couple of housings.  I could send you drawings.  What is your email offline.
Cheers, Hugh.
hfulton at q-subs.com

-----Original Message-----
From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Ken Martindale via Personal_Submersibles
Sent: Friday, 19 June 2015 1:00 p.m.
To: 'Personal Submersibles General Discussion'
Subject: [PSUBS-MAILIST] LED Lights

Any one there,


I worked at a job where I designed LED drivers. I was looking at the Bridgelux Varo 29 (BXRC-50C 10K0-L-24) which has a light output of a little over 10000 lumens. 
I bought one of these but haven’t fired it up, maybe tomorrow.

I can design the driver to interface with almost any input voltage such as 10 to 30 volts or 20 to 60 volts, etc.

They make reflectors for this LED so it would be relatively easy to come up with a number of 10000 lumen lights for your Subs.

I have some time on my hand and can design the circuitry to drive any selected LED module. Or LED.

I have the time and some funding to come up with lights for the subs.

Is anyone interested in this. We could come up with lights that would only cost the parts.

The first step would be to come up with a specification that would detail most of PSubs needs. Such as variable light output (10,000 to 20,000 lumens), over temperature protection, reverse polarity protection, LED over current protection, EMI, etc.

I would be interested in doing the design work including PWBs.

What do you guys think?  I would need help on the mechanical housings.

Cooling is a major concern but while immersed there’s lots of water. Above water Over temperature protection would prevent any damage if you left the lights on by accident.

Any interest? This could be fun. Jon??

The spec would be the first step and then with enough agreement the design process would start.

Not too interested in doing this commercially.

For what it’s worth I’m an EE specializing in switch mode power converters.

Ken Martindale


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