[PSUBS-MAILIST] LED Lights

Fri Jul 24 11:37:58 EDT 2015

Thanks, I am happy with the light.  Just wish we had the 10,000 lumen
version available to us when we did the project.

OAS, I finally got around to looking at Woodstock.  She is going to look
sweet in the water.  I love the lines of the boat.  Noticed you shortened
her from her Solo days.  If I am seeing the picture correctly, it looks
like you have a protective acrylic cover over that beautiful bow viewport
Greg fabricated for you.  That's a nice way to protect the viewport
without bars obstructing the view.    Judging on the size of your straddle
MBTs, it looks like you are going to have quite a bit of freeboard.  From
your estimated water level with the MBTs fully blown, can you see above the
waterline while sitting near the bow viewport?   Lastly, I like the aft
syntactic foam balls but to me you should replace the 5 balls with just two
big ones oriented horizontally.  After all, most outsiders think we must
have big ones to take these boats out!

Cliff

On Fri, Jul 24, 2015 at 9:51 AM, Alec Smyth via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> All right, I'm officially impressed! That is fantastic Cliff.
>
> Best,
>
> Alec
>
> On Fri, Jul 24, 2015 at 9:55 AM, Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Ken, if you go to Youtube and do a search on https://youtu.be/D7VnwODU7vk,
>> or 5000 Lumen Bridgelux Vero 18 LED light, you will see a short video of
>> the light.
>>
>> Cliff
>>
>> On Thu, Jul 23, 2015 at 3:29 PM, Ken Martindale via Personal_Submersibles
>> <personal_submersibles at psubs.org> wrote:
>>
>>> Cliff,
>>>
>>>
>>>
>>> How do I look at them??
>>>
>>>
>>>
>>> Ken
>>>
>>>
>>>
>>> *From:* Personal_Submersibles [mailto:
>>> personal_submersibles-bounces at psubs.org] *On Behalf Of *Clifford Redus
>>> via Personal_Submersibles
>>> *Sent:* Thursday, July 23, 2015 4:18 PM
>>> *To:* Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> *Subject:* Re: [PSUBS-MAILIST] LED Lights
>>>
>>>
>>>
>>> Now that Jon has the forum site set up for the LED light project, my
>>> suggestion is to move the discussion to the forum site called out in Jon's
>>> email.  BTW, I have uploaded to the site the wiring diagram and housing
>>> drawings for the 5000 Lumen light that was designed by the ME students I
>>> was mentoring last year.
>>>
>>>
>>>
>>> Cliff
>>>
>>>
>>>
>>> On Thu, Jul 23, 2015 at 2:55 PM, Ken Martindale via
>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>
>>> Doing the dimming electrically is easy but the problem is the extra
>>> wiring and where do you mount the Potentiometer?
>>>
>>>
>>>
>>> We can include the wires in the cable for use as an option this also
>>> complicates the cabling. Instead of two wires we would require 4 wires.
>>>
>>>
>>>
>>> Personally I also like the dimming since it will extend the time you can
>>> use it out of the water. Anybody also like or dislike? Cliff would like to
>>> delete.
>>>
>>>
>>>
>>> You guys be sure to keep reading the spec. it will have almost daily
>>> updates for a while.
>>>
>>>
>>>
>>> Ken
>>>
>>>
>>>
>>> *From:* Personal_Submersibles [mailto:
>>> personal_submersibles-bounces at psubs.org] *On Behalf Of *Alan James via
>>> Personal_Submersibles
>>> *Sent:* Thursday, July 23, 2015 3:31 PM
>>> *To:* Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> *Subject:* Re: [PSUBS-MAILIST] LED Lights
>>>
>>>
>>>
>>> Cliff, Ken,
>>>
>>> I like the dimming option. The 10,000 lumens may be too much light in
>>>
>>> some low visibility conditions where there is a lot of back scatter.
>>>
>>> The 5,000 lumen option may act like a fog light.
>>>
>>> Also I am thinking of having lights mounted to the side which may not
>>>
>>> need to be as intense.
>>>
>>> Depth rating.... looking at the drawings of various 10,000 meter light
>>> housings,
>>>
>>> it seems simple to achieve a reasonable depth without much more cost.
>>>
>>> Potting the board..... I would be careful about what was potted in case
>>> some of the
>>>
>>> components needed to get rid of a bit of heat.
>>>
>>> Mechanical housing..... with you on that one Cliff. Like the idea of the
>>> recessed light.
>>>
>>> Alan
>>>
>>>
>>> ------------------------------
>>>
>>> *From:* Clifford Redus via Personal_Submersibles <
>>> personal_submersibles at psubs.org>
>>> *To:* Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> *Sent:* Friday, July 24, 2015 4:06 AM
>>> *Subject:* Re: [PSUBS-MAILIST] LED Lights
>>>
>>>
>>>
>>> Ken, good first pass at the specs.  Below are comments.  BTW, I will
>>> post these here as I have not been able to get the activation code back yet
>>> on registering at the forum.
>>>
>>>
>>>
>>> Item 2.1 DC Voltage.  If it were me, I would stick with nominal battery
>>> bank voltages of 24 and 36 VDC.  When I switch to MK 101 thrusters, I
>>> dropped my main battery bank voltage to 36VDC my instrumentation bus is
>>> 24VDC.  Would need a single fuse holder to accept fuses to handle different
>>> nominal voltages.
>>>
>>>
>>>
>>> Item 4.0 Depth Requirement.  In the spirit of keeping cost down, I think
>>> 500 meters (1640 ft) would be more than enough.  I know Scott is designing
>>> a deep diving boat but is any one else shooting for more than 500m?
>>>
>>>
>>>
>>> 6.0 Dimming.   I would omit the ability to dim the light.  Yes I know it
>>> is easy from an electrical point of view but it forces us to go with more
>>> pins on the subsea connector.  I am thinking on installing multiple lighs
>>> so I could just control on/off for each light.  I could go either way on
>>> this but in the spirit of KISS, I vote to omit dimming.
>>>
>>>
>>>
>>> 8.3 Ports  I would change plastic to acrylic.  I don't think we will end
>>> up here but if we do, we can use PVHO flat view port calcs to size the
>>> acrylic lens.
>>>
>>>
>>>
>>> 9.0 Printed Wiring Boards.  I really like the way the Minn-Kota motor
>>> controller PWBs are potted.  Rather than using the spray on hydrophobic
>>> coatings, to me we should pot the board (accept for access to fuse).
>>> Therefore suggest changing the word coated to potted.
>>>
>>>
>>>
>>> 11.0 Mechanical Housing.  I suggest.  The LED panel light and PCB shall
>>> be contained in a single 1-atm flange mounted cylindrical housing with a
>>> low profile that can be recessed in a FRP shell with attachment screws from
>>> the rear of the flange.  The housing should contain a single 29 LED Array
>>> rated at 10,000 lumens  with a rated power of  91-140 lumens/W (109-71W).
>>> Mounting holes will be provided for an optional SS yoke style support
>>> bracket.
>>>
>>>
>>>
>>> Material: Hard anodized 6061-T6 or 7071-T6  TBD (I have a grey beard
>>> machinist friend that owns a machine shop.  He loves 7071-T6 as it is a
>>> dream to machine and stronger than 6061-T6.
>>>
>>>
>>>
>>> On Thu, Jul 23, 2015 at 9:52 AM, Ken Martindale via
>>> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>
>>>
>>>
>>> Cost is critical. The electronics should be a small part of the cost.
>>> The housing might be the most expensive.
>>>
>>>
>>>
>>> Hope you guys are reading the specification.
>>>
>>>
>>>
>>> Ken
>>>
>>>
>>>
>>> *From:* Personal_Submersibles [mailto:
>>> personal_submersibles-bounces at psubs.org] *On Behalf Of *Clifford Redus
>>> via Personal_Submersibles
>>> *Sent:* Thursday, July 23, 2015 10:18 AM
>>> *To:* Personal Submersibles General Discussion <
>>> personal_submersibles at psubs.org>
>>> *Subject:* Re: [PSUBS-MAILIST] LED Lights
>>>
>>>
>>>
>>> Jon, thanks for setting up the forum.  I am assuming we can post files
>>> as well.
>>>
>>>
>>>
>>>  I agree low cost is important but having a functioning light is as
>>> well.  OTS LED utility lights like that one you noted are not an option
>>> unless they can be potted.  To me the best way to keep the cost low, is to
>>> publish construction drawings of a 1-atm  DIY housing that a psubber could
>>> machine or have machined by a friend, and publish a design of a PCB that
>>> could be easily fabricated using  one of the PCB online sites like
>>>  ExperessPCB www.expresspcb.com and DIY populate the board.  As a
>>> group, we design and build a prototype that I can test in my shop. If it
>>> works as designed, then we post to the psubs site a report, that includes
>>> the design drawings, circuit diagram, parts list and test results.
>>>
>>>
>>>
>>> Getting a consciences on the design spec is the first step.
>>>
>>>
>>>
>>> Cliff
>>>
>>>
>>>
>>> On Wed, Jul 22, 2015 at 10:11 PM, Jon Wallace via Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>>
>>> My three words of advice...cost, cost, cost.
>>>
>>> One measure of a success for this project will be how many people
>>> actually build/use it.  If it costs more to manufacture than just
>>> purchasing something like
>>> http://www.surpluscenter.com/Electrical/Lights/DC-Mobile-Equipment-Lights/12-24-VDC-3120-LUMEN-16-LED-UTILITY-FLOOD-LIGHT-12-999-B.axd
>>> off the shelf then it's real world application by psubbers may be limited.
>>>
>>> Over-spec'ing the design above requirements for typical recreational
>>> operations (ie 10,000 psi capability) is likely going to drive up the
>>> cost.  Also, let's remember that "cheap", "low cost", and "good price" are
>>> relative terms for a diverse group like PSUBS so include realistic
>>> estimates of parts and manufacturing especially if tooling is required.
>>>
>>> Jon
>>>
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>>>
>>>
>>>
>>>
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>>>
>>>
>>>
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>>
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