[Lab] christmas light pcb

Andrew O'Malley aomalley at gmail.com
Wed Dec 26 13:19:45 EST 2012

Adafruit does have a new strip that only has one data wire, so perhaps it
is similar:

Interesting that there doesn't seem to be master controller?  That Adafruit
lights use a microcontroller to send the patterns to pixels, (entering at
the first pixel's DI and shifting out to the next one w/ DO and so on).

Let us know if you manage to control it.


Date: Mon, 24 Dec 2012 03:17:55 -0500
> From: Peter Sjoberg <peters-modlab at techwiz.ca>
> Subject: [Lab] christmas light pcb
> To: lab at artengine.ca
> Message-ID: <1356337075.8524.127.camel at defiant1.intra.techwiz.ca>
> Content-Type: text/plain; charset="utf-8"
> I picked up a Christmas light at walmart and trying to find info about
> it. What interested me is that for $8 I got 15 RGB LEDs, each with it's
> own little pcb and it seems like they can be controlled individually! Of
> course it's not as simple as reading the specs because I haven't found
> any (did google the numbers found) and the IC is a black blob so no help
> there.
> I opened up the first and last one to take some pictures. The first one
> has 5V feed on the upper row marked "DI", the bottom row marked "DO" has
> 3 wires going to next light where it comes in on the "DI" row, out on a
> "DO" and my guess is that it goes on like that to the end.
> I took some pictures of it that can be seen at
> http://flickr.com/gp/henahadu/73436S/
> My question is - anyone seen anything like it ? Any clue on where/how I
> can find more info? Somewhere else to ask ?
> /ps
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