Put on your sunglasses before wiring up this LED matrix - 64
eye-blistering RGB LEDs adorn the NeoMatrix for a blast of
configurable color. Arranged in an 8x8 matrix, each pixel is
individually addressable. Only one microcontroller pin is required to
control all the LEDs, and you get 24 bit color for each LED.
Wiring it up is easy: there are two 3-pin connection ports. Solder
wires to the input port and provide 5VDC to the +5V and ground pins,
then connect the DIN pin to your microcontroller. If you're using our
NeoPixel Arduino library, use digital #6. You'll also need to make a
common ground from the 5V power supply to the microcontroller/Arduino.
Since each LED can draw as much as 60mA (thats up to 3.5 Amps per
panel if all LEDs are on bright white!) we suggest our 5V 2A power
supply. For most uses, you'll see about 1-2A of current per panel.
If, say, you need MORE blinky, you can chain these together. For the
second shield, connect the DIN connection to the first panel's DOUT.
Also connect a ground pin together and power with 5V. There you go!
You can chain as many as you'd like although after 4 or more panels
you may run low on RAM if you're using an UNO. Watch your power usage
too, you may need a 5V 10A power supply for so many of these!
There is a single data line with a very timing-specific protocol.
Since the protocol is very sensitive to timing, it requires a
real-time microconroller such as an AVR, Arduino, PIC, mbed, etc. It
cannot be used with a Linux-based microcomputer or interpreted
microcontroller such as the netduino or Basic Stamp. Our
wonderfully-written Neopixel library for Arduino supports these
pixels! As it requires hand-tuned assembly it is only for AVR cores
but others may have ported this chip driver code so please google
around. An 8MHz or faster processor is required.
Check out our Neopixel library on github  and our installation
tutorial here .
http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use/ … more
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A light-emitting diode (LED) is a semiconductor light source.LEDs are used as indicator lamps in many devices and are increasingly used for other lighting. Introduced as a practical electronic component in 1962, early LEDs emitted low-intensity red light, but modern versions are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness.
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