32x16 and 32x32 RGB LED Matrix
Created by Phillip Burgess
Last updated on 2018-08-22 03:32:54 PM UTC
Guide Contents
Guide Contents
Overview
Power
Connections
Connecting to Arduino
Connecting Using RGB Matrix Shield
Metro M4 Usage
Connecting with Jumper Wires
Connect Ground Wires
Upper RGB Data
Lower RGB Data
Row Select Lines
LAT Wire
OE Wire
CLK Wire
Connecting Using a Proto Shield
Connect Ground Wires
Upper RGB Data
Lower RGB Data
Row Select Lines
LAT Wire
OE Wire
CLK Wire
Test Example Code
Library
How the Matrix Works
Downloads
Files
Schematic & Fabrication Print
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© Adafruit Industries
https://learn.adafruit.com/32x16-32x32-rgb-led-matrix
Page 2 of 42
Overview
This guide is for ARDUINO and compatible boards — Arduino Uno, Mega, Zero, and Adafruit Metro 328, Metro M0
and M4. We have a
different guide for Raspberry Pi
(https://adafru.it/kdh).
Bring a little bit of Times Square into your home with our RGB LED matrix panels. These panels are normally used to
make video walls — here in New York we see them on the sides of buses and on bus stops — to display animations or
short video clips. We thought they looked really cool so we picked up a few boxes from the factory. One has 512 bright
RGB LEDs arranged in a 16x32 grid on the front, the other has 1024 LEDs in a 32x32 grid. On the back is a PCB with
IDC connectors (one set for input, one for output: in theory you can chain these together) and 12 16-bit latches that
allow you to drive the display with a 1:8 (16x32) or 1:16 (32x32) scan rate.
© Adafruit Industries
https://learn.adafruit.com/32x16-32x32-rgb-led-matrix
Page 3 of 42
These panels require 12 or 13 digital pins (6 bit data, 6 or 7 bit control) and a good 5V power supply, at least a couple
amps per panel. We suggest our 2A (or larger) regulated 5V adapters and either a terminal block DC jack, or solder a
jack from our DC extension cord. Please read the rest of our tutorial for more details!
Keep in mind that these displays are normally 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 Uno, we managed to squeeze 12-bit color (4096 colors) but this
display would really shine if driven by an FPGA, CPLD, Propeller, XMOS or other high speed multi-processor controller.
© Adafruit Industries
https://learn.adafruit.com/32x16-32x32-rgb-led-matrix
Page 4 of 42
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 Uno or Mega, you'll need 12 digital pins, and about 800 bytes of RAM to hold the 12-bit
color image (double that for the 32x32 matrix).
The library works with a LIMITED NUMBER of boards: Arduino Uno, Mega, Zero, Adafruit Metro M0 and Metro
M4. Other boards (such as the Arduino Leonardo) ARE NOT SUPPORTED.
© Adafruit Industries
https://learn.adafruit.com/32x16-32x32-rgb-led-matrix
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