[sudo-discuss] LED nube

Thu Feb 8 11:01:50 PST 2018

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
>>>>>>>> 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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