[PSUBS-MAILIST] Personal_Submersibles Digest, Vol 45, Issue 19

Fri Mar 10 15:19:33 EST 2017

Hey everyone I got my plans in! For my k250 all components are ordered I
noticed that there are some illustrations missing from the plans that refer
to hydroform frames for and aft is this referring to the fabrication molds
for the main fiberglass blalast, does anyone have these

On Mar 10, 2017 11:24 AM, "via Personal_Submersibles" <
personal_submersibles at psubs.org> wrote:

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> Today's Topics:
>
>    1. Re: LED Light test (Alan via Personal_Submersibles)
>    2. ja: 1 (James Burger via Personal_Submersibles)
>    3. Seahorse KD (Beram Mahmoud via Personal_Submersibles)
>    4. Re: Seahorse KD (MerlinSub at t-online.de via Personal_Submersibles)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 10 Mar 2017 19:48:26 +1300
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion
>         <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] LED Light test
> Message-ID: <8953F88A-2100-4457-B369-0ED8DAB8568C at yahoo.com>
> Content-Type: text/plain; charset="us-ascii"
>
> Brian,
> will keep you in mind. I am making up 8 initially.
> Still working on how I'll pot the wiring going in.
> I have been using the West system epoxy & adding hardener to it as I see
> fit.
> I definitely don't trust resin alone to seal, so I'm going over the top of
> the
> resin with silicone or some sort of synthetic rubber. I will be asking
> advice
> on that one. I feel you need a flexible outer coating that sticks well to
> the
> wire jacket & compresses with it under pressure.
> Alan
>
>
>
> Sent from my iPad
>
> > On 10/03/2017, at 6:50 PM, Brian Cox via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >
> > Alan,      If you make an extra one of your LED lights I would be more
> than happy to buy it off you !
> >
> > Brian
> >
> >
> >
> > --- personal_submersibles at psubs.org wrote:
> >
> > From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> > To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> > Subject: Re: [PSUBS-MAILIST] LED Light test
> > Date: Thu, 9 Mar 2017 22:40:49 +1300
> >
> > Thanks Steve,
> > that's great to know about the heat on the acrylic lens & your testing.
> > At the moment I am driving my lights with a buck / boost constant
> current driver
> > that has a 60V input for my 48V system. It took a lot of work tracking
> down a
> > unit that was suitable for 48V.
> > A friend put me on to those linear regulators & is trying to convince me
> to go
> > with them. I will keep your information in mind should I need to argue
> my way
> > out of them.  They would be good for a Sub on a 36 V system, as most of
> the
> > high power LEDs are 36V.
> > Have a look at the flip chip LED I'm using if you haven't already seen
> it.
> > Smaller than the usual cob LEDs.
> > http://www.tyf-led.com/downloadRepository/82befdc2-
> 15b3-4ff0-a553-6f53a4d8e404.pdf
> > Got mine with pigtails on for $6:50- each.
> > Cheers Alan
> >
> >
> >
> > Sent from my iPad
> >
> > On 9/03/2017, at 9:54 PM, Stephen Fordyce via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >
> > Hi Alan,
> > I'm glad your lights are going well!  There are a couple of things I may
> be able to contribute after several iterations of designing the circuit for
> my TFM caving/diving helmet lights.
> >
> > 1. Linear vs switching LED drivers.
> > I looked at the datasheet for your LED driver chip and it appears to be
> a linear regulator - this in general terms means it creates a variable
> resistance to get the output current/voltage right, and as such can create
> a lot of heat which may be wasteful.  Ie. if you have a 12V supply and your
> LED needs 4V, 67% of the power will be lost in the driver!  But if you have
> a 12V supply and your LED chain needs 11.5V, then it's quite efficient.
> They are simple and easy, and small as you point out, with no external
> components.
> >
> > A switching driver uses very fast (MHz) PWM along with an external
> capacitor/inductor to drop and smooth out the voltage, and is ~90+%
> efficient over a big range of voltage drops.  This means it creates much
> less heat and saves power.
> >
> > I changed to switching drivers for my LEDS (input 7-8V, output 3-4V) and
> noticed a huge difference in heat and efficiency.  Just something to be
> aware of if you run into heat or runtime problems.
> >
> > 2. Acrylic windows
> > I have used lasercut acrylic (6mm) in my caving lights (which I've had
> up to 80degC according to the internal temp sensor.  Lasercutting allows me
> to get an oblong rectangular shape with holts for screws.  The lights have
> a full high temperature burn test out of the water and then multiple dives
> to 100m in my pressure pot, with no acrylic failures to date.
> >
> > Cheers,
> > Steve Fordyce
> >
> > On Thu, Mar 9, 2017 at 6:12 PM, Alan via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> > Tested my 80W LED light in a housing, to see how hot it got in & out
> > of the water.
> > The good news was it didn't get warm at all after running at 70W for
> > 25 minutes in the kitchen sink. Out of the water it hit 120F (49C) in 7
> > minutes. The LED has a maximum temperature rating of 60C so was keeping
> > back a bit from that.
> > I dropped the current down & ran it out of the water at 33W & 25W but it
> climbed
> > to 125F in 20 minutes for 33W & 15 minutes for the 25W.
> > I am using a cast acrylic 8mm thick lens, & this didn't get hot either
> in air
> > or water. Using acrylic instead of glass is saving me $90-.
> > Am making a few minor housing design adjustments for the final iteration.
> > Have also ordered a dozen of these 50 V 350 mA constant current
> regulator &
> > LED drivers.
> >
> > http://www.onsemi.com/PowerSolutions/product.do?id=NSI50350AD
> > They are TINY; about 1/4" square & you run them in series to get the
> desired
> > amperage. They have a wide input voltage & would be great for a 36V
> system.
> > Alan
> >
> >
> > Sent from my iPad
> >
> > _______________________________________________
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> > Personal_Submersibles at psubs.org
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> >
> >
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> > _______________________________________________ Personal_Submersibles
> mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/
> listinfo.cgi/personal_submersibles
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> ------------------------------
>
> Message: 2
> Date: Fri, 10 Mar 2017 08:35:46 -0400
> From: James Burger via Personal_Submersibles
>         <personal_submersibles at psubs.org>
> To: "pendee" <pendee at sbcglobal.net>, "perdoc10"
>         <perdoc10 at hotmail.com>, "perdoc10" <perdoc10 at yahoo.com>,
> "PEREZMALKOY"
>         <PEREZMALKOY at coned.com>, "personal submersibles"
>         <personal_submersibles at psubs.org>
> Subject: [PSUBS-MAILIST] ja: 1
> Message-ID: <a12152351ab7$5bfcbd65$6dd29fb5$@aol.com>
> Content-Type: text/plain; charset="us-ascii"
>
>
> http://black-matters.com/vsrimzsi.php?James_Burger
>
>
>
> Sent from my iPad
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> ------------------------------
>
> Message: 3
> Date: Fri, 10 Mar 2017 16:05:06 +0100
> From: Beram Mahmoud via Personal_Submersibles
>         <personal_submersibles at psubs.org>
> To: <personal_submersibles at psubs.org>
> Subject: [PSUBS-MAILIST] Seahorse KD
> Message-ID: <006001d299af$b5050fa0$1f0f2ee0$@gmx.de>
> Content-Type: text/plain; charset="us-ascii"
>
> Dear Everyone,
>
>
>
> as someone who is interested in that topic since many years.
> I have just found an interesting homepage concerning the Bruker Seahorse KD
> Submarine.
>
> I have also called the company and they informed me that the submarine is
> NOT FOR SALE.
>
> Nevertheless you can find many interesting information's there.
>
>
>
> http://seahorse-kd.com/
>
>
>
> Best regards
>
>
>
> Beram Mahmoud
>
>
>
>
>
> ---
>
> Dipl.-Ing.(FH); M.A.
>
> Mobile: +49 (0) 16094813279
>
> Email:  <mailto:beram.m at gmx.de> beram.m at gmx.de
>
>
>
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> ------------------------------
>
> Message: 4
> Date: Fri, 10 Mar 2017 17:23:16 +0100 (MET)
> From: "MerlinSub at t-online.de via Personal_Submersibles"
>         <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion
>         <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Seahorse KD
> Message-ID:
>         <1489162996637.730094.6af5eec5ea5e2fb97ef87756135342
> 5cb99d8cfa at spica.telekom.de>
>
> Content-Type: text/plain; charset="utf-8"
>
> I no belive that they have the submarine really under operation.
> The last picture are 7 years old showing a sub resting on a parking lot in
> Germany (!) since 15-20 years.
> The electronic and sonars are from the early 80ies, the batteries and the
> arcilc dome offline since years.
>
> vbr Carsten
>
>
>
> -----Original-Nachricht-----
> Betreff: [PSUBS-MAILIST] Seahorse KD
> Datum: 2017-03-10T16:08:53+0100
> Von: "Beram Mahmoud via Personal_Submersibles"
> <personal_submersibles at psubs.org>
> An: "personal_submersibles at psubs.org" <personal_submersibles at psubs.org>
>
>
>
>
> Dear Everyone,
>
>
>
> as someone who is interested in that topic since many years?
> I have just found an interesting homepage concerning the Bruker Seahorse KD
> Submarine.
>
> I have also called the company and they informed me that the submarine is
> NOT FOR SALE.
>
> Nevertheless you can find many interesting information?s there.
>
>
>
> http://seahorse-kd.com/ <http://seahorse-kd.com/>
>
>
>
> Best regards
>
>
>
> Beram Mahmoud
>
>
>
>
>
> ---
>
> Dipl.-Ing.(FH); M.A.
>
> Mobile: +49 (0) 16094813279
>
> Email: beram.m at gmx.de <mailto:beram.m at gmx.de>
>
>
>
> ?
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>
> End of Personal_Submersibles Digest, Vol 45, Issue 19
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