[sudo-discuss] LED nube

hol at gaskill.com hol at gaskill.com
Fri Feb 9 10:35:50 PST 2018


that was with 5V strips that were terminated every 10m, and we ran
heavier gauge conductors parallel to the strip.  Using 12V you can go
alot farther without noticeable dimming.  Reason to connect end to end
is current path is cut in half for interior injectors.
On 2018-02-08 11:15, Cere Davis wrote:

> I'm not even sure why you would want to do this when you could just cut the strip (if needed) and use separate power supplies.  Then again, if you wanted to preserve the strip as one piece, I guess I could see it. 
> 
> On Thu, Feb 8, 2018 at 11:01 AM, Jake <jake at spaz.org> wrote:
> you could get oscillations or other undefined behavior if you connect multiple
> regulated power supplies in parallel. 
> 
> On Thu, 8 Feb 2018, hol at gaskill.com wrote:
> 
> It's OK to inject power at multiple points along the strip in my opinion, say every 20-30' as long as they share a common ground
> 
> Only really necessary to do this if you notice dimness away from a single injection point - there is alot of current being used along the strip between injection points so the PSUs should not 'talk to eachother' or run any risk of reverse current if the output voltages at the terminals are slightly off.
> 
> I've used the 5V rails from 2 different computer PSUs to run about 50m of addressable LED strip with injection every 10m.  Regular female 2.1mm barrel jacks were soldered to one end of every strip and 2-3 male plugs w/ extension leads were soldered to the PSUs for ease of setup/takedown.
> 
> On 2018-02-07 15:32, Jake wrote:
> yes it's pretty easy to solder to ends of this LED tape
> 
> there are little copper pads and you solder to them
> 
> On Wed, 7 Feb 2018, Cere Davis wrote:
> 
> I mean if I cut the strip and use the power supply that is provided then I
> need to come up with another power supply for the remainder of the tape
> that I want to use later.  So wondering if it's easy to solder the wires
> from another power supply onto the section that has been cut off?
> 
> On Wed, Feb 7, 2018 at 3:09 PM, Jake <jake at spaz.org> wrote:
> 
> i don't understand the question.  There are solder points at both ends of
> each
> discrete 3-LED circuit.  You can splice this tape back together after
> cutting
> it if you solder carefully.
> 
> if you want to use multiple power supplies, they should be connected to
> separate sections of LED tape, power supplies' outputs should not be
> paralleled
> together.
> 
> -jake
> 
> On Wed, 7 Feb 2018, Cere Davis wrote:
> 
> Is it relatively easy to splice in new power supplies into these things
> after you've cut one?
> 
> On Wed, Feb 7, 2018 at 2:21 PM, Cere Davis <ceremona at gmail.com> wrote:
> 
> Thanks Jake.
> 
> On Wed, Feb 7, 2018 at 12:35 PM, Jake <jake at spaz.org> wrote:
> 
> hi Cere,
> 
> you're correct that you can cut that type of LED tape along any of the
> dotted
> lines.  It's made up of a bunch of independant circuits which each have
> 3
> LEDs
> and resistors and run on 12V, and then they're all in parallel for 12V
> down the
> whole strip.  The current draw from your 12V power supply will change
> with the
> number of LEDs, but the voltage will always be 12V.
> 
> -jake
> 
> On Wed, 7 Feb 2018, Cere Davis wrote:
> 
> Hey Folks,
> 
> I'm sort of an LED nube and am looking for confirmation that this:
> https://www.aliexpress.com/item/5M-Roll-3528-60led-m-12VDC-I [1]
> P65-soft-strip-light-5cm-cut-led-tape-light-for/32440112867.
> html?spm=2114.search0104.3.81.29a1356aJIB9xN&ws_ab_test=sear
> chweb0_0,searchweb201602_1_10152_10151_10065_10344_10130_100
> 68_10324_10547_10342_10325_10546_10343_10340_10548_10341_105
> 45_10084_10083_10618_10307_10313_10059_5722311_10534_100031_
> 10103_10624_10623_10622_10621_10620_10142,searchweb201603_
> 25,ppcSwitch_5&algo_expid=21979fdd-56eb-4fec-95af-89ed7a
> 33c672-12&algo_pvid=21979fdd-56eb-4fec-95af-89ed7a33c672&
> transAbTest=ae803_5&priceBeautifyAB=0
> 
> <https://www.aliexpress.com/item/5M-Roll-3528-60led-m-12VDC- [2]
> IP65-soft-strip-light-5cm-cut-led-tape-light-for/32440112867
> .html?spm=2114.search0104.3.81.29a1356aJIB9xN&ws_ab_test=sea
> rchweb0_0,searchweb201602_1_10152_10151_10065_10344_10130_10
> 068_10324_10547_10342_10325_10546_10343_10340_10548_10341_10
> 545_10084_10083_10618_10307_10313_10059_5722311_10534_100031
> _10103_10624_10623_10622_10621_10620_10142,searchweb201
> 603_25,ppcSwitch_5&algo_expid=21979fdd-56eb-4fec-95af-89ed7a
> 33c672-12&algo_pvid=21979fdd-56eb-4fec-95af-89ed7a33c672&
> transAbTest=ae803_5&priceBeautifyAB=0>item
> works they way I think it does.  My only question, really, is whether I
> can
> just cut the strip at the designated locations and it will work fine
> with a
> 12v power supply without any need for extra resistors?  It looks like
> the
> LEDs all sit in parallel along the strip so therefore...?
> 
> Thanks,
> Cere
> 
> --
> *Cere Davis*
> 
> Science-Art | Kinetic Sculpture
> CereDavis.com
> @ceremona <http://Twitter.com/Ceremona>

--
*Cere Davis*

Science-Art | Kinetic Sculpture
CereDavis.com
@ceremona <http://Twitter.com/Ceremona>

--
*Cere Davis*

Science-Art | Kinetic Sculpture
CereDavis.com
@ceremona <http://Twitter.com/Ceremona>

-- *Cere Davis*

Science-Art | Kinetic Sculpture
CereDavis.com
@ceremona <http://Twitter.com/Ceremona>

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  -- 

CERE DAVIS 

Science-Art | Kinetic Sculpture 
CereDavis.com [4] 
@ceremona [5]
 

Links:
------
[1] https://www.aliexpress.com/item/5M-Roll-3528-60led-m-12VDC-I
[2] https://www.aliexpress.com/item/5M-Roll-3528-60led-m-12VDC-
[3] https://sudoroom.org/lists/listinfo/sudo-discuss
[4] http://CereDavis.com
[5] http://Twitter.com/Ceremona
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