[PSUBS-MAILIST] LED Lights

Thu Jul 23 10:52:34 EDT 2015

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 <http://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 <mailto: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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