[PSUBS-MAILIST] PSUBS light project status

Sat Jul 2 17:05:15 EDT 2016

While this would work if I moved the driver inside the boat, I still want
to try and have the LED light electronics self contained.  As such, the
this DC buck convertor is way to large.

Cliff

On Sat, Jul 2, 2016 at 3:42 PM, Alan James via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Cliff,
> here is a video revue of a 40V buck converter constant currant driver.
> This isn't the video I was looking for. He has one that covers most of
> the available options for driving high power leds, but I'm heading out
> & he has a lot of videos.
> Alan
> Review: 3A 40V Digital Buck DC/DC Converter - It's more like a Bench PSU!
> <https://www.youtube.com/watch?v=S_KjmF1iI9w>
>
>
> Review: 3A 40V Digital Buck DC/DC Converter - It's more like a Bench PSU!
> This digitally controlled buck converter is so stacked with features, it's
> more like a miniature bench power...
> <https://www.youtube.com/watch?v=S_KjmF1iI9w>
>
> ------------------------------
> *From:* Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Sunday, July 3, 2016 8:05 AM
> *Subject:* Re: [PSUBS-MAILIST] PSUBS light project status
>
> 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
> <http://www.dx.com/p/5a-constant-current-led-driver-module-battery-charger-red-433947#.V3dE1bh96Uk>
>
>
> $ 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.
>
> <http://www.dx.com/p/5a-constant-current-led-driver-module-battery-charger-red-433947#.V3dE1bh96Uk>
>
> ------------------------------
> *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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