[PSUBS-MAILIST] LED Lights

[Jon Wallace via Personal_Submersibles]

Sounds like a good project.  Besides cooling, I think the next biggest 
concern would be power requirements.  At 12vdc what would the amperage 
draw be?  Can the electronics provide for variable output, say 3-10k 
lumens via a simple potentiometer?  It's possible that 10k lumens could 
be more than what we need realistically.

Requirements:
1) All you stated in your email
2) Variable output, 3-10k
3) Spotlight and floodlight designs for the reflector
4) Housing that allows for "EASY" oil compensation.

I'll start a project page for it and we can update it as necessary.  
That way people won't have to parse through multiple emails to get all 
the info about it.

Jon

On 6/18/2015 8:59 PM, Ken Martindale via Personal_Submersibles wrote:
> 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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