LED Matrix Multi-Display kit Duo for Arduino

Name: LED Matrix Multi-Display kit Duo for Arduino
SKU: 3399
Price: 29.95 USD
Availability: Discontinued
Rating: 3.75 (1 reviews)

(1 Review)

This a kit with 2 LED matrix display boards and a shield to control it using Arduino

Designed by I-SYST in Canada

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LED Matrix Multi-Display kit Duo for Arduino 1

2014-09-25T23:07:03.532Z-LMXSHIELD_KITDUO_640.png

Your idea ! Our solutions to build it.

This a kit with 2 LED matrix display boards and a shield to control it using Arduino

LED Matrix Multi-Display Shield Kit for Arduino This kit includes 2 x IDM-LMX3208 series (32x8 RED LED matrix display module) and a LMXSHIELD (Arduino interface for the display). Arduino Uno is not …

LED Matrix Multi-Display Shield Kit for Arduino

This kit includes 2 x IDM-LMX3208 series (32x8 RED LED matrix display module) and a LMXSHIELD (Arduino interface for the display). Arduino Uno is not included. Small API with fonts written in standard C/C++ for Arduino, ARM processor are provided. API can be easily ported to other processors. Full source code is available free to use without restriction, BSD style license. The software allow you to arrange the display to be combined to make 64x8 dot or separate with simple configuration settings. Text is displayed and scroll using simple printf like functions. See bellow

Features :

16 levels PWM brightness control
Support Synchronized blinking in daisy chained configuration
Can interface up to 8 boards together for a total of 256x8 or separate in any combination
Serial interface to microcontroller requires only 5 digital pins
Small API for programming with full C/C++ source code available
API is provided as library for Arduino
Display board dimension : 3mm model: 128x52mm (5.04" x 2.05"), 5mm model: 241x80mm (9.5”x3.15”)
Operating voltage 5V
Wavelength 635 nm (Red color)

Tutorial on this page http://embeddedsoftdev.blogspot.ca/p/arduino.html

Review Breakdown

Average Ratings

Product: (4.00)

Documentation: (4.00)

Shipping: (3.00)

Communication: (4.00)

Mattias | Dec. 21, 2015

Nice product, gets the job done

This is a nice a complete platform for all my needs to create large Arduino-powered displays. The documentation is a bit weak, but the example project is a good starting point, but the instructions on how to wire everything up is a bit confusing I think. Eventually figured it out, so no biggie - but don't expect a good out-of-the-box. As I had fewer displays that the 8 mentioned in the example project I managed to mess everything up in the first attempts by deleting the non-used entries in the arrays.

Mounting the displays proved to be a bit difficult due to the placement of the CS1-4 DIP-switch. We mounted 2x2 on wooden bars using the holes, but then these DIP-switches are in the way and we needed to chip some wood of the bars. All other components are mounted between the flat-cable connectors and are out of the way. Would be nice if the next version would move the DIP-switches up to the area between the two segment connectors that don't have the U1 chip mounted (i.e. between the rows of R11/14/16/15/13 and R9/R12/R10).

Driving the displays seems to be a bit taxing taxing on the Arduino. I use a Dragino Yun shield to get the data to display and scrolling is a bit jumpy when the Dragino sends data on the RX/TX. I reverted to only use static messages which is fine for my application.

Providing power to the displays may be a problem with many displays. A separate powersupply on the LMXSHIELD for the displays would be nice not to overheat the Arduino converter.

The 5 mm version is clearly readable from at least 15 meters when the intensity is adjusted a bit. Too bright is a bit hard to read.

Response from I-SYST | Dec. 23, 2015

Thanks very much for the details explanation of your experiences with it.
- We take notes of the DIP switch to move it out of the way in the next revision of the board.
- We do have another shield that have onboard power supply that can drives up to 16 boards. This one here https://www.tindie.com/products/hnhoan/led-matrix-shield-display-for-arduino-and-imm-nrf51822/
- To reduce the heat on the Arduino converter, use a power adapter with lower voltage around 7v would do. The higher voltage adapter you use, the more it will heat up the Arduino due to it LDO converter nature.
- The displays and shield are wired by 2 ribbon cable. The cables have a notch so that you cannot plug it in reverse. One cable connect to 2 displays together, the other is to connect the display to the shield. There are no other wirings. There is also drawing in the user guide showing the connection between multiple display boards. Can you give a little more details of the wiring problem that you are having so we can add it to the user guide.
- The software source code showed you how to write scrolling routine. It was made on Arduino Uno. The scrolling need to adjust timing delay based your board and what you are running on. the jumpy scroll is due to the fact that your code is blocking on other things. You need to adjust the timing in your code to allow the display to refresh. Scrolling requires you to update the display, it is totally software, not hardware.
- The displays has 16 intensity levels you can set. The software library has all the functions to allow you to control it.

Thank you very much for your review.