[PSUBS-MAILIST] LED Lights

Wed Jul 22 08:06:01 EDT 2015

Perhaps one spot design and one flood design would be a good idea?

Sean

On July 21, 2015 8:54:12 PM MDT, Clifford Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>Alec, on the work we did on the 5000 lumen LED, you had to be very
>careful
>that you designed heat sinks in the housing to dissipate heat  or the
>manufacture solder joint would fail.  The 5000 lumen  Vero 18 has a
>diameter of 3.6 cm.  The Vero 29, is 4.9 cm or only about 40% larger. 
>My
>major concern on packaging 4 of these little beast in one housing is
>that
>it is going to pull quite a bit of power and generate a lot of heat to
>dissipate.  Even though you would save money on connectors as you say,
>I would like to see us stick with one Vero 29 arrays per housing to
>make it
>easier to deal with the heat and keep from drawing so much current. 
>Also
>with the smaller housing,  if we limit the max depth of say 1000 fsw,
>it
>would be easy to handle the pressure with a 1-atm housing.  Also if we
>stick with one Vero 29 array per light, we can design the light so that
>it
>won't have be submerged to operate.
>
>The 5000 lumen light I have will blind you.  Can't imagine what a
>10,000
>lumen version would be like let alone a 40,000 lumen light!
>
>Not locked to anything at this point.
>
>Cliff
>
>On Tue, Jul 21, 2015 at 8:59 PM, Alec Smyth via Personal_Submersibles <
>personal_submersibles at psubs.org> wrote:
>
>> I was not familiar with the Vero 29 but just looked it up and I see
>it's
>> under 5cm in diameter and less than 2mm thick! Wow, that means we're
>> talking about a really small little device despite the hefty lumens
>output.
>> Since the packaging is so small, and given the current draw is about
>4
>> amps... do you guys think it might be worth making an array of four
>of
>> these Vero 29s into each light? The cost of machining would likely
>not be
>> that much more, and the cost of the Subconn connector identical, so
>it
>> might be quite a bit more economical per lumen to go with a little
>array of
>> four. It would be a ridiculous number of lumens, ridiculous is good
>in this
>> case and we're still at a size that would fit very easily on any sub.
>>
>> A first stab at housing decisions, not very premeditated:
>>
>> - Oil filled, so that depth rating is immaterial. In my case I would
>need
>> it to go to 1000 feet, or more if I wanted it to go on the sub during
>a
>> depth test.
>> - Aluminum housing, for ease of machining and corrosion resistance.
>> - Flexible plastic lens, to act as a compensation bladder for thermal
>> expansion.
>> - Subconn connector, not because you need the pressure rating but
>because
>> it will keep the oil in reliably!
>>
>> Just some initial ideas, I don't own the truth.
>>
>>
>> Best,
>>
>> Alec
>>
>>
>> On Tue, Jul 21, 2015 at 8:34 PM, Clifford Redus via
>Personal_Submersibles
>> <personal_submersibles at psubs.org> wrote:
>>
>>> Ken/Alan/Alec/Jon
>>>
>>> More Thoughts
>>>
>>> After Jon sets up a place were we can collaborate and share files,
>if it
>>> would be helpful, I could post the drawings I have for 5000 lumen
>flat body
>>> 1-atm LED light and a  short video of the 5000 lumen LED in
>operation.  My
>>> thinking is in order to fast track the project we could take this
>design as
>>> a starting point and just geometrically scale up the housing  just
>large
>>> enough to fit 10000 lumen Bridgelux Vero 29 and its support base. 
>Should
>>> be plenty of room for a larger diameter PCB that Ken can design. We
>should
>>> be able to use the same  Subconn MCBH-3MP connector.  We get a good
>>> discount on Subconn connectors through Psubs.  This design uses a
>hard
>>> anodized 6061-T6 for the housing and a 3/8" borosilicate glass for
>the
>>> lens.  The lens was an OTS item from McMaster Carr. This design did
>not
>>> have a reflector but it would be easy to incorporate after we settle
>on
>>> beam angle.
>>>
>>> To me, the key is to work as group on the draft spec that Ken comes
>up
>>> with.  From the housing perspective, the key items the spec needs to
>call
>>> out are :
>>>
>>> 1) design depth,
>>> 2) 1-atm vs  oil pressure compensated,
>>> 3) housing material
>>> 4) type of electrical penetrator
>>>
>>>  I have Autodesk Inventor Professional loaded on my PC.  Using
>feedback
>>> from the group I can use Inventor to generate fabrication drawings
>an do
>>> the FEA work. After we freeze the design, we take Alec up on his
>offer to
>>> machine the housing.  If for any reason, he can't , I can use the
>machine
>>> shop I work with to machine the housing. After we have the
>prototype, I can
>>> test it in my test chamber.  For those that don't have Inventor,
>Autodesk
>>> has a nice 3-D viewing software that the team should be able to
>download
>>> for free and to view and critique design iterations.
>>>
>>>
>>> Cliff
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> On Tue, Jul 21, 2015 at 6:15 PM, Alan James via
>Personal_Submersibles <
>>> personal_submersibles at psubs.org> wrote:
>>>
>>>> Hi Ken,
>>>> a few thoughts once you have settled on the
>>>> electronics are.....
>>>> Do we want a hard anodized aluminium housing?
>>>> Do we want the housing oil filled?
>>>> What sealing configuration do we want?
>>>> What beam angle do we want?
>>>> What sort of reflector?
>>>> What sort of lense?
>>>> How are we going to seal the cable coming in to the housing?
>>>>    Some of these answers may be dictated by what is available off
>>>> the shelf at a reasonable price.
>>>> Cheers Alan
>>>>
>>>>
>>>>   ------------------------------
>>>>  *From:* Ken Martindale via Personal_Submersibles <
>>>> personal_submersibles at psubs.org>
>>>> *To:* 'Personal Submersibles General Discussion' <
>>>> personal_submersibles at psubs.org>
>>>> *Sent:* Wednesday, July 22, 2015 5:16 AM
>>>> *Subject:* Re: [PSUBS-MAILIST] LED Lights
>>>>
>>>> The electronics and custom PWB won’t be the issue. Figuring out
>what we
>>>> want may be the biggest problem.
>>>>
>>>> Ken
>>>>
>>>>
>>>>
>>>> *From:* Personal_Submersibles [mailto:
>>>> personal_submersibles-bounces at psubs.org] *On Behalf Of *Clifford
>Redus
>>>> via Personal_Submersibles
>>>> *Sent:* Thursday, July 16, 2015 3:52 PM
>>>> *To:* Personal Submersibles General Discussion
>>>> *Subject:* Re: [PSUBS-MAILIST] LED Lights
>>>>
>>>> Alan, we have a lot of collective experience we could use on the
>>>> project.  I really love the fact that Ken is an EE with experience
>LED
>>>> drivers.  After we agree on specs and packaging I am sure he can
>design a
>>>> custom PCB for the electronics.  Having just gone through the
>exercise of
>>>> designing a 1-arm housing, I don't think it will be difficult to
>design the
>>>> housing.
>>>>
>>>> Cliff
>>>> On Thursday, July 16, 2015, Alan James via Personal_Submersibles <
>>>> personal_submersibles at psubs.org> wrote:
>>>>
>>>> Cliff,
>>>> I'm on board with the LED light project.
>>>> Have done a bit of experimentation & bought about 10 different LED
>>>> flashlights, underwater flashlights, flood lights & various lenses.
>>>> I also have a friend whose working involves running banks of LED
>>>> lights on advertising hordings, if we get stuck on the technical
>side.
>>>> 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 17, 2015 2:15 AM
>>>> *Subject:* Re: [PSUBS-MAILIST] LED Lights
>>>>
>>>> Ken, I have been off the list for some time due to work and due to
>my
>>>> email service not passing through psub emails.  I had to go to a
>gmail
>>>> email account to get back in the loop.
>>>>
>>>> I am in on your suggestion to build LED psub light based on the
>>>> Bridgelux Varo 29 (BXRC-50C 10K0-L-24) .   I can help on the
>housing design
>>>> and I have access to a machine shop to fabricate the housing. I
>also have
>>>> test chamber we can use to qualify the prototype.  Maybe we could
>pick one
>>>> of the DeepSea Power and light LEDs take its specifications and
>tweak to
>>>> fit a typical psubs application.
>>>>
>>>> We would probably need to set up something like Dropbox location,
>>>> accessible to all that want to participate in the design,
>fabrication and
>>>> testing to keep from swamping the PSUB  list.
>>>>
>>>> I have a function LED subsea light that works fine but would like
>more
>>>> lumens.  It is a 5000 lumen light but would like a 10,000 lumen
>light.
>>>>
>>>> My suggestion is for you take the point since you came up with
>idea.
>>>> Maybe we could canvas the site and see would be interested in
>working on
>>>> the project as a first step.  Given your background in EE, maybe
>you could
>>>> come up with a first pass at the specification and we can comment
>on it.
>>>>
>>>> Cliff
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Personal_Submersibles mailing list
>>>> Personal_Submersibles at psubs.org
>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>>
>>>>
>>>> _______________________________________________
>>>> Personal_Submersibles mailing list
>>>> Personal_Submersibles at psubs.org
>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Personal_Submersibles mailing list
>>>> Personal_Submersibles at psubs.org
>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>>
>>>>
>>>
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>>
>>>
>>
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>
>>
>
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Personal_Submersibles mailing list
>Personal_Submersibles at psubs.org
>http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20150722/032c367a/attachment.html>