12mm Diffused Flat Digital RGB LED
Pixels (Strand of 25) - WS2801
PRODUCT ID: 738
RGB Pixels are digitally-controllable lights you can set to any color, or
animate. Each RGB LED and controller chip is molded into a 'dot' of
silicone. The dots are weatherproof and rugged. There are four flanges
molded in so that you can 'push' them into a 12mm drill hole in any
material up to 1.5mm/0.06" thick. They're typically used to make outdoor
signs. These pixels have a flat square back, we also have pixels that are
long and thin, both are the same electronics, just different shapes!
The pixels are connected by a 4-conductor cable. +5V (Red), Ground
(Blue), Data (Yellow) and Clock (Green). Data is shifted down from one
pixel to the next so that you can easily cut the strand or attach more onto
the end.
Each dot is digitally controlled, with an internal 8-bit PWM LED driver (24bit color for 16 million different shades). The pixels must be clocked by a
microcontroller, we have an example code linked below that works on an
Arduino, it should be simple to adapt it to any other microcontroller.
The pixels use 8mm diffused RGB LEDs, with a 120 degree beam width.
The total max brightness of all LEDs is about 1600mcd but with the light
more evenly distributed & mixed than a clear LED. (Please note: mcd
ratings of LEDs are notoriously inflated by most LED sellers, so be extraskeptical when reviewing LED ratings!)
Sold by the strand, each strand has 25 pixels in series! Each strand has
two JST SM 4-pin connectors so you can connect multiple strands in a
row, as many as you wish, just watch for how much current they want. We
now have LED pixel strands with the power wires (red & blue) spliced out
so its really easy to connect 5VDC in using a 2.1mm jack terminal adapter.
We have a 5V/2A supply that should be able to drive 2 or more
strands and a 5V/10A supply that can drive up to 160 LEDs all lit up at
once
If you want to connect to the input of a strand (to wire it to power and a
microcontroller) please get a plug connector. If you want to connect to
the output, get a receptacle cable.
You can drive these with an Arduino using any two microcontroller digital
pins, check this library which also has example code to demonstrate the
strands and be sure to read our very detailed tutorial on usage!
TECHNICAL DETAILS
12mm diameter (0.45") 23mm deep (0.9") from the top of the LED
to the back of the rubber
80mm / 3" apart on the strand
25 pieces per strand
These pixels use a WS2801 chip for full 24 bit color
5V power, 60mA maximum per pixel (LED on full white)
Wire gauge is 20AWG
2-pin SPI-like protocol
WS2801 Datasheet for the chip inside each pixel
Brightness: Red = 3.3 Lumens/300 mcd, Green = 10 Lumens/1000
mcd, Blue = 2.7 Lumens/300 mcd (mcd calculation based on full
120 degree beam)
https://www.adafruit.com/product/738 12‐3‐18
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