[PSUBS-MAILIST] LED recommendations

Sun Sep 3 02:12:41 EDT 2017

Cliff,
thanks I would be interested in how it works out.
Alan

Sent from my iPad

> On 3/09/2017, at 11:52 AM, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan I have ordered two  of the drivers and will do some bench testing.  With my AGM batteries after a full charge I am setting at about 38.5-39V.  The LED driver has a soft start so when my four other LED come on, the battery voltage will be pull down so I am thinking I will be close but ok. I will let you know how the test come out.
> 
> Regards
> 
> Cliff
> 
>> On Sat, Sep 2, 2017 at 5:37 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> Cliff,
>> did Emile say he was running this driver off 24V?
>> It says in the user manual....
>> )  Connect the power supply.
>> It is important to ensure that the input voltage <= Total-Led voltage. (Boost-principle). If not the LED(s) get to much voltage and can damage!
>> 
>> You may be pushing the limits if your led output voltage is set at 38V & your input
>> 
>> voltage is 40V.  I have read in other step up manuals that there needed to be a 2V boost difference. ie If your input was 36V your output needed to be 38V. I am not sure 
>> 
>> what will happen if your input is above the output setting. Perhaps it will bump the
>> 
>> output up by 2V above the input. 
>> 
>> Can you email the manufacturer & ask them if it would be suitable for our application?
>> 
>> Having said that; on a 36V battery bank the charge will settle down to below 40V in time.
>> 
>> This is just the problem that I spent ages googling to try & find an answer for.
>> 
>> The 36V system is just in the wrong range for these 36V LEDs.
>> 
>> 
>> 
>> Cheers Alan
>> 
>>    I 
>> 
>> 
>> Sent from my iPad
>> 
>>> On 2/09/2017, at 11:59 PM, Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> Emile's email got me back on the Psubs 10K LED light project which has been on hold waiting for a driver.  This LED driver is perfect for driving the 10K lumen Bridgelux LED array we spected.  It will work for 12V, 24V and 36V system.  Also because it is so small it enabled me to reduce the size of the 1-atm enclosure to 3" diameter x 2.85" long.  In the spirt of KISS a custom PCB has been abandoned as well as the provisions for dimming. The driver has provisions for dimming but for this installation, it is not implemented. With not having a custom PCB we loose the polarity and overcurrent protection but the driver has built in overtemperature proection.  I have updated the drawings for the light and Jon has uploaded them to the PSUBS.org site.  See http://www.psubs.org/design/  and click on Lights to download PDF drawings including a wiring diagram.  I completed an FEA analysis and the enclosure should be good for 1000m.  At this point we need to build one of the lights as a prototype and test.  I have a test chamber I can use to test the light.  I am thinking about fabricating one of the lights for the bow of my boat but I have to figure out where to mount it and how to get power to it. 
>>> 
>>> This is a draft set of drawings.  Comments/suggestions welcome.
>>> 
>>> Regards
>>> 
>>> Cliff
>>> 
>>>> On Mon, Aug 28, 2017 at 3:07 AM, emile via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> Hi Jon,
>>>> 
>>>> The Pilotfish team and me  developed a UW LED lamp. Since the Norway expedition on my sub. So happy with it that I like to recommend it.
>>>> It is a Bridgelux Vero 29 unit with 80 Watt (abt. 300 watt Halogen) Wide (90-100 deg) angle but that is okay for a sub. Housing is can go down to 800 M and has a 80 mm OD.
>>>> Dimmable, I don’t run it at full power.
>>>> LED driver 6-40 VDC : https://pcb-components.de/led-aufwaertswandler-boost-step-up/led-senser-xtreme-200-2050ma-6v-30v-detail.html
>>>> 
>>>> 
>>>> Br, Emile
>>>> 
>>>> -----Oorspronkelijk bericht-----
>>>> Van: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] Namens Jon Wallace via Personal_Submersibles
>>>> Verzonden: maandag 28 augustus 2017 4:29
>>>> Aan: Personal Submersibles General Discussion
>>>> Onderwerp: [PSUBS-MAILIST] LED recommendations
>>>> 
>>>> 
>>>> While we're in the middle of an LED investigation, can those of you actively diving with LED lighting give us a guideline on a range of lumens we should be striving for (per lamp), how many lamps, spot or flood?
>>>> 
>>>> I know Alec was using an oil-filled 3000 lumen lamp on SNOOPY before selling it.  I've been looking at PRIMELUX 8100 lumen lamp that seems like it could be easily adapted for oil or air compensation.  Generally I would say more light is better but also need to be careful about power consumption so I don't want to purchase more light than is necessary for general operations.
>>>> 
>>>> Jon
>>>> 
>>>> 
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