[PSUBS-MAILIST] LED Lights

Tue Jul 21 20:34:25 EDT 2015

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
>
>
>
>
>
>
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