Groups > sci.electronics.components > #6303

Re: Full color spectrum LEDs

From	rickman <gnuarm.deletethisbit@gmail.com>
Newsgroups	sci.electronics.design, sci.electronics.components
Subject	Re: Full color spectrum LEDs
Date	2018-01-10 09:54 -0500
Organization	A noiseless patient Spider
Message-ID	<p359fo$sh3$3@dont-email.me> (permalink)
References	<37o25dpn8kj535a81ha25k5eugin8fd2f8@4ax.com> <tp875d1pmqu71eu1dammm88ah9sqf4jq2g@4ax.com> <p31uq3$m56$1@gioia.aioe.org> <8ks95dpucn355a5i94gd5a6skqlnv7s5nb@4ax.com> <be0a5d9euf70d9jhptukc0elnau90mqr4n@4ax.com>

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oldschool@tubes.com wrote on 1/9/2018 1:15 PM:
>
> I noticed that a local bar has one of those Internet Juke Boxes and it
> has a border around it that contains the full spectrum LEDs. It goes
> thru all the colors of the rainbow, and is quite colorful. Now that I
> know that those LEDs consist of multiple LED elements inside one "bulb",
> I am curious what sort of circuit blends them? I assume there is a chip
> made just for that purpose....

Multi-color LEDs would be controlled by an MCU.  The ones I've worked with 
appear to be a shift register.  They can be daisy chained so they appear to 
be a single very long shift register.  The MCU shifts out the bit pattern 
that controls the three LEDs in each package as one very long string of bits 
every time it needs to update the string of LEDs.

-- 

Rick C

Viewed the eclipse at Wintercrest Farms,
on the centerline of totality since 1998

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Thread

Full color spectrum LEDs oldschool@tubes.com - 2018-01-06 18:06 -0600
  Re: Full color spectrum LEDs Jeff Liebermann <jeffl@cruzio.com> - 2018-01-08 09:14 -0800
    Re: Full color spectrum LEDs oldschool@tubes.com - 2018-01-08 12:59 -0600
      Re: Full color spectrum LEDs Jeff Liebermann <jeffl@cruzio.com> - 2018-01-08 21:36 -0800
      Re: Full color spectrum LEDs Jasen Betts <jasen@xnet.co.nz> - 2018-01-11 23:19 +0000
    Re: Full color spectrum LEDs Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2018-01-09 08:34 +0000
      Re: Full color spectrum LEDs oldschool@tubes.com - 2018-01-09 03:32 -0600
      Re: Full color spectrum LEDs Jeff Liebermann <jeffl@cruzio.com> - 2018-01-09 09:16 -0800
        Re: Full color spectrum LEDs oldschool@tubes.com - 2018-01-09 12:15 -0600
          Re: Full color spectrum LEDs rickman <gnuarm.deletethisbit@gmail.com> - 2018-01-10 09:54 -0500
          Re: Full color spectrum LEDs Jeff Liebermann <jeffl@cruzio.com> - 2018-01-10 09:45 -0800
            Re: Full color spectrum LEDs oldschool@tubes.com - 2018-01-11 01:43 -0600
              Re: Full color spectrum LEDs Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2018-01-11 08:34 +0000

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