[sudo-discuss] LED nube

Thu Feb 8 09:12:43 PST 2018

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
>>>>>>> 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-
>>>>>>> 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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