[PSUBS-MAILIST] PSUBS light project status

[Alan via Personal_Submersibles]

Cliff,
what voltage are you running on your sub?
You can generally run these leds at a lower voltage & it is 
beneficial to them. If you have a bench top power supply that goes to 36V, you can
slowly power up the led without a driver & check if it is bright enough at 36V. Don't
do this for more than a second or so or you may destroy the led. I am having a 48V 
system, but the choices in electronics that are compatible, dramatically drops over a 36V system.
I have looked at just about every off the shelf led dc driver on the planet.
cheers Alan



Sent from my iPad

> On 3/07/2016, at 7:03 am, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> This LED driver will not work for the 10K lumen Bridgelux LED as it needs 38V forward voltage , 2.1 amps and 80W.  This driver can only get up to 36V.
> 
> Cliff
> 
>> On Fri, Jul 1, 2016 at 11:39 PM, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> Alec,
>> I have been working on a light housing. Have attached a dwg but it is not finalized.
>> I would have had it completed but have been waiting a Month on a replacement motor
>> for my lathe :(
>> I am using a square 50W LED, but you can get 60 & 80W LEDs the same size.
>> I am NOT putting the driver in the light housing, it ends up sitting at the back of the LED
>> where there is a massive amount of heat generated from these high power LEDs.
>> Keeping the driver in the hull makes it easy to change out if it fails.
>> I am going with an acrylic lens & oil compensated. I would have liked a borosilicate pressure
>> resistant lens but it was going to cost $100-+. Also if there is a leak with a pressure resistant
>> housing, electrolysis can pressurize it with hydrogen gas.
>> I am not using a reflector as they don't seem to do anything with these big LEDs. They are really
>> rows of little 1W LEDs,10X6 for a 60W. So you get light being emitted from either side of the inch
>> wide emitter, that is hard to control, especially when you are wanting an  80 degree wide angled
>> flood light.
>> My design also revolves around local stock aluminum tube sizes.
>> The LEDs are around 30 to 36V. I am using these as drivers. $4.64 US, not bad.
>> Alan
>> Constant Voltage Constant Current DC-DC Power Module for Arduino
>> 
>> 
>> $ 4.64	
>> Constant Voltage Constant Current DC-DC Power Module for Arduino
>> I like this from DX. Find the cool gadgets at a incredibly low price with worldwide free shipping here.
>> 
>> From: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org>
>> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
>> Sent: Saturday, July 2, 2016 1:41 PM
>> Subject: [PSUBS-MAILIST] PSUBS light project status
>> 
>> Hi gents,
>> 
>> I have an almost-ready sub but no lights, so was wondering whether to make them per the PSUBS-designed model in the community projects section of the website. I'm in awe of those drawings! However, they show a printed wiring board that is a placeholder for a part still to be designed. I was wondering if that might have happened, or if there might be an ETA?  
>> 
>> Thanks,
>> 
>> Alec
>> 
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