[PSUBS-MAILIST] PSUBS light project status

Sat Jul 9 14:47:28 EDT 2016

So the LM393N rated to 70C may malfunction before the 
thermal protection cuts in at 75C?
Alan

Sent from my iPad

> On 10/07/2016, at 2:48 am, Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Correction, shuts off at 75C.
>  
> Ken
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan via Personal_Submersibles
> Sent: Friday, July 08, 2016 9:25 PM
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] PSUBS light project status
>  
> Yes I did briefly.
> Thanks for that, it represents a lot of work. Wish I was as talented.
> I saw you were using an LM393N that is rated to 70 C whereas there seems to be other
> similar products rated to 105 C. Is there a suitable alternative with the higher temperature
> rating? The Vero 29 has a max rating of 105 C., am wondering what component
> is the lowest denominator as far as temperature is concerned?
> Cheers Alan
>  
> 
> 
> Sent from my iPad
> 
> On 9/07/2016, at 12:44 pm, Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> I take it you looked at the schematic?
>  
> Ken
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan via Personal_Submersibles
> Sent: Friday, July 08, 2016 5:58 PM
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] PSUBS light project status
>  
> Thanks Ken,
> Ouch, that's a lot of components to try & pack in to the back
> of the housing & keep cool. I guess that's what happens when
> you are designing a generic unit.
> Also the Vero 29 operating voltage doesn't help, as you need to
> build a buck / boost system for the varying sub voltages.
> Was reading that the European electric car manufacturers are
> agreeing on a standardised 48V system. Perhaps there will be some
> spin offs for submarines that adopt 48V, like off the shelf led drivers,
> cheap charging / battery monitoring systems, battery packs etc.
> Cheers Alan
> 
> Sent from my iPad
> 
> On 9/07/2016, at 7:55 am, Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
>  
> I think it’s on a project page and it’s existing now.
>  
> Take a look.
>  
> Ken
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan via Personal_Submersibles
> Sent: Friday, July 08, 2016 3:19 PM
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] PSUBS light project status
>  
> Thanks Ken,
> look forward to the circuit diagram.
> Alan
> 
> 
> Sent from my iPad
> 
> On 9/07/2016, at 1:39 am, Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
>  
> The simplest thing to do with my design is to change one of the resistor values for the current required by the Vero or any other LED with the same current.
>  
> This resistor controls the current through the LEDs and is independent of the input voltage and within certain limits independent of the LEDs forward voltage.
>  
> Thanks,
>  
> Ken
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Alan via Personal_Submersibles
> Sent: Thursday, July 07, 2016 8:44 PM
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] PSUBS light project status
>  
> Hi Ken,
> I am running a 48V system & haven't found a suitable led driver
> for that input that will run the vero 29 or other 36V leds. 
> Would it be difficult to adapt your driver design to a 48V input?
> I was looking at this switch mode regulator as a possible candidate.
> http://www.ti.com.cn/cn/lit/ds/symlink/lm2593hv.pdf
> I believe you are designing a boost / buck system. I am not sure how much
> extra circuitry is involved in the boost side. Will it be possible to
> simply eliminate the boost circuitry when copying your design?
> Cheers Alan
>  
> 
> 
> Sent from my iPad
> 
> On 8/07/2016, at 4:12 am, Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Thanks Cliff,
>  
> Can you send me your off line E-mail address?
>  
> Thanks,
>  
> Ken
> wmartindale at cfl.rr.com
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Cliff Redus via Personal_Submersibles
> Sent: Wednesday, July 06, 2016 7:24 PM
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] PSUBS light project status
>  
> Ken, good news on all fronts.  Welcome back.
>  
> Cliff
>  
> On Wed, Jul 6, 2016 at 3:31 PM, Ken Martindale via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> To all,
>  
> My wife has been cleared of cancer and I’ll be back on the LED project, starting tomorrow.
>  
> Sorry to drop out for so long,
>  
> Ken Martindale
>  
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Cliff Redus via Personal_Submersibles
> Sent: Friday, July 01, 2016 10:40 PM
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] PSUBS light project status
>  
> Alec, I was doing the 1 arm can for the light and Ken was doing the electronics.  Ken bailed out so unless someone steps up to take over the LED driver side of the project, we are dead in the water.  If someone could source a small OTS LED driver, I could go forward.  
> 
> On Friday, July 1, 2016, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 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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>  
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