[PSUBS-MAILIST] PSUBS light project status

[Alec Smyth via Personal_Submersibles]

Hi Ken,

I'm going back and forth between 50W or 100W lights. On the one hand I feel
there is no such thing as too bright a light, but eventually (100W x 2
lights) the current draw becomes burdensome. Is there a way to go with the
100W light but have a dimmer pot so I could reduce the current and
brightness if I wanted to economize on battery draw at certain times?


Thanks,

Alec

On Fri, Jul 8, 2016 at 9:39 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
> <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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