[Hackupy-discuss] Lighting

[Arlen Abraham]

Hi Dana,

I'm not sure exactly what you have in terms of LED tape, but
preliminary poking at ebay suggested the current draw is 2A. The
instructable you linked to uses the LM317 regulator, which is only
good for 1.5A/18W
(http://www.national.com/mpf/LM/LM317.html#Overview).

There are a lot of good options out there for making simple drivers
for running the tape, but I'm not sure it's strictly necessary
depending on how the LED tape is constructed. Check the spec sheet
before connecting directly to a car battery :)

Running lighting on 12VDC is a problem that has been solved by people
who make things for RVs and cars.

The reason I like the 12VDC Christmas lights is there are no solder
joints to worry about, no heat sinks, no parts to source, no enclosure
to build, they have familiar looking parts that won't freak out fire
inspectors, etc. They just work.

That being said, if your goal here is to learn and teach, by all means
make a thing.

--a



On Tue, Nov 22, 2011 at 17:39, Dana S. <dsniezko at sonic.net> wrote:
> For the moment I bought a 5M 12V waterproof LED strip:
> http://www.ebay.com/sch/?_nkw=5m%20led
>
> And some 1W and 3W LEDs,  will use something to diffuse the light.
> http://www.ebay.com/sch/i.html?_nkw=star+led+high+power
>
> I'm not very experienced with high power led drivers, would something like this work?
> http://www.instructables.com/id/Super-simple-high-power-LED-driver/
>
> - Dana
>
>
> On Tue 22/11/11  4:46 PM , Rubin Abdi <rubin at starset.net> wrote:
>
>> Arlen Abraham wrote, On 2011-11-21 20:23:
>> > Tiz the season:
>> > http://www.amazon.com/gp/aw/d/B005OI67KU/ref=redir_mdp_mobile [1]
>>
>> These lights are pretty close to what you want. The give enough light
>> without being too painful to look at.
>>
>> The other option are 3W LEDs...
>>
>> http://www.ebay.com/itm/10-pcs-New-3W-High-Power-white-Led-Lamp-Prolight-St
>> ar-/230683894264?pt=LH_DefaultDomain_0&hash=item35b5d4e1f8[2]
>>
>> One of these with a single 9V battery can last for 6ish hours, give or
>> take. They're bright as hell, and can also blind you if you stare into
>> it. They require a heat sink but considering how cold it is outside,
>> they should be fine without one.
>>
>> I think one would need a drive to make it work with 12V properly. You
>> could also make it run off of some AA batteries and recharge them.
>>
>> Miloh: Do you have any input? I'm still keen on building Altoids lights
>> that can be reused with one of these on the lid.
>>
>> --
>> Rubin
>> rubin at starset.net
>>
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>>
>>
>>
>> Links:
>> ------
>> [1]
>> http://webmail.sonic.net/parse.php?redirect=http://www.amazon.com/gp/aw/d/B
>> 005OI67KU/ref%3Dredir_mdp_mobile[2]
>> http://webmail.sonic.net/parse.php?redirect=http://www.ebay.com/itm/10-pcs-
>> New-3W-High-Power-white-Led-Lamp-Prolight-Star-/230683894264%3Fpt%3DLH_Defa
>> ultDomain_0%26amp%3Bhash%3Ditem35b5d4e1f8[3]
>> http://webmail.sonic.net/parse.php?redirect=http://lists.hackerspaces.org/m
>> ailman/listinfo/hackupy-discuss
>>
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