These displays are technically 'chainable' - connect one output to the next input - but our
Arduino example code does not support this (yet). It requires a high speed processor and more
RAM than the Arduino has!
These panels require 13 digital pins (6 bit data, 7 bit control) and a good 5V supply, up to 4A
per panel. We suggest our 4A regulated 5V adapter and then connecting a 2.1mm jack. Please
check out our tutorial for more details!
Comes with: a single 32x32 RGB panel, one IDC cable and a power cable. If we happen to get
them from the factory we also include 4 mounting screws and mini-magnets (it appears these
are often mounted on a magnetic base).
Keep in mind that these displays are designed to be driven by FPGAs or other high speed
processors: they do not have built in PWM control of any kind. Instead, you're supposed to
redraw the screen over and over to 'manually' PWM the whole thing. On a 16 MHz arduino, we
managed to squeeze 12-bit color (4096 colors) with 40% CPU usage but this display would
really shine if driven by any FPGA, CPLD, Propeller, XMOS or other high speed multi-core
controller. The good news is that the display is pre-white balanced with nice uniformity so if you
turn on all the LEDs it's not a particularly tinted white.
Of course, we wouldn't leave you with a datasheet and a "good luck!" We have a full wiring
diagrams and working Arduino library code with examples from drawing pixels, lines,
rectangles, circles and text. You'll get your color blasting within the hour! On an Arduino, you'll
need 13 digital pins, and about 1600 bytes of RAM to buffer the 12-bit color image. At this time
we do not have wiring documentation for the MEGA.
Please note! These panels are remainder stock from factories that make huge light boards. For
that reason, the look and size might vary from batch to batch, even though the basic operation,
codebase and tutorial is the same.
Medium 32x32 RGB LED matrix panel (9:31)
TECHNICAL DETAILS
We don't have a spec or datasheet at this time. However, these are the specifications from the
factory
Dimensions: 190.5mm x 190.5mm x 14mm / 7.5" x 7.5" x 0.55"
Panel weight with IDC cables and power cable: 357.51g
5V regulated power input, 4A max (all LEDs on)
5V data logic level input
2000 mcd LEDs on 6mm pitch
1/16 scan rate
Indoor display, 150 degree visibility
Displays are 'chainable' - connect one output to the next input - but our Arduino example
code does not support this yet
We have a full tutorial here!
Please Note: As of April 23rd 2018 this product is not ROHS compliant.
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