Tag Archives: matrix

Building the Colossus LED Display

by Adam Haile @ maniacallabs.com:

The 2014 NC Maker Faire was a huge turning point for Maniacal Labs. It was there that the idea for the AllPixel and what is now BiblioPixel got their start. It’s also where we showed off our first custom-built LED display, the 24×24 LPD8806 matrix. At nearly 24 inches square, and 1 pixel per inch, it was certainly impressive. But we left the Maker Faire with a desire to go bigger. Not just more pixels… but physically larger. Much larger. We call it “Colossus”.

Building the Colossus LED Display – [Link]

Tutorial on the Design & Implementation of an FPGA RGB LED Matrix Driver

In this episode Shahriar and Timo demonstrate the design methodology of an FPGA based 32×32 RGB LED matrix driver. Timo has kindly devoted some of his time to describe the block diagram and the thought process which goes into designing this type of FPGA display driver. The various components of the overall system (PLL, UART, and Display Controller) are shown along with the simulation data. The outputs of the Spartan-6 FPGA board are then measured using a Keysight S-Series oscilloscope. The design of the RGB matrix is also demonstrated using a custom clock interface sent wirelessly to the unit via Bluetooth.

Tutorial on the Design & Implementation of an FPGA RGB LED Matrix Driver – [Link]

64×16 RED LED Marquee


by Tustin High T-Tech @ instructables.com:

The purpose of this small scale LED marquee is to display messages to our classroom in a more modern and centralized way. In the classroom, this construction would save white board space and is convenient because it can store a large amount of information. It is also fairly simple to program and has a mount, making it easy to place anywhere within the classroom setting.

64×16 RED LED Marquee – [Link]

10×5 RGB LED Matrix with only 5 IO pins


by Ole_L @ instructables.com:

If you wanna build a fancy led matrix display with only a few pixels, this is exactly what YOU need!

You need:
-An Arduino
-WS2812(B) LED strip
-A piece wood
-7 jumper wires
-7 female pin headers
-some capacitors
-some wires

10×5 RGB LED Matrix with only 5 IO pins – [Link]

3D Spectrum Analyser

by Dooievriend @ tweakblog.tweakblogs.net:

More than a year ago, a friend of mine asked me to write the software for his 3D Spectrum Analyser (3DSA): a device that takes as input an audio signal, and outputs its visualisation on a 3D matrix of leds. If the above description doesn’t quite ring a bell, simply watch the end result in action.

First things first though, the microprocessor to be programmed was an 80MHz Olimex PIC32, soldered to the PIC32-PINGUINO-OTG development board. (For those who ever tinkered with Arduino boards: it’s the same, only with a faster chip and fewer builtin libraries ) The Algorithm had to sample the input signal at regular time intervals, convert this signal to the frequency domain, and visualize the detected frequencies on a 16x16x5 LED matrix.

3D Spectrum Analyser – [Link]

LED Graphic Equaliser from the 80s


by SteveQuinn @ instructables.com:

For those of you who remember the eighties, this will no doubt bring back fond memories when every piece of audio equipment in the known universe was at the time equipped with a plethora of LEDs.

More specifically the ubiquitous Graphic Equaliser or ‘Graphic EQ’.

This Instructable is centred around the MSGEQ7 to create a simple 2 Channel Graphic EQ and documents my first, poor attempt at using the Arduino Uno R3, the Arduino development environment and coding in ‘C’ for well over a decade.

LED Graphic Equaliser from the 80s – [Link]

LED Dot Matrix Display


by Phil Townshend @ edutek.ltd.uk :

A nifty 32×7 dot matrix display module, programmable via an RS232 serial port. There are preset inputs to display preset messages or simply control directly from a PC or laptop.

The principle of the display is based on our persistance of vision, the same thing that enables us to watch movies without seeing the flickering changes of frame. This display has 32 LEDs horizontally by 7 vertically. At any one time there is only ever one column of LEDs lit. The on’s and off’s are presented to the anode connections while the columns are enabled one by one. In this way a dot display of characters can be generated and when the speed is increased sufficiently, we stop seeing the flickering and see it as a steady display of dots.

LED Dot Matrix Display – [Link]

Make a Custom Membrane Keypad for Arduino


by paulbleisch.com:

My son got one of these Leap Frog toys a few years ago as a gift. He enjoys playing with it very much. I am not sure how much counting and learning he is doing but it makes funny noises and sings to him so its a lot of fun.

Recently the unthinkable happened. It died. Not the batteries but something else. I took the back off to look at what might be wrong (which was very easy for a toy). Unfortunately, other than the speaker, a switch, battery compartment, and a ribbon cable to the front, there wasn’t much to investigate. A couple of glop tops and nothing else. I fiddled a bit more with it but everything “external

How to make a diffusor for your LED Matrix


by Jan_Henrik @ instructables.com:

Hi, in this Instructable I want to show you how to create your own diffusor for a LED Matrix. To do this we will use a 3D printer and OpenSCAD. In this tutorial I will use a LOL-Shield by Jimmie ( http://jimmieprodgers.com/kits/lolshield/ ) also I will explain, how to design a diffusor for different matrix sizes and shapes.

As I recently was at the 31C3 in Hamburg i got a LOL-Shield from Jimmie. This shield is holding 126 LED´s which are Charlieplexed. After coding some animations and a game on it I thought that the LED´s where too bright. Because I wanted to keep the greyscale ( dimming ) of the matrix I decided to design and build a diffusor.

How to make a diffusor for your LED Matrix – [Link]

DIY LED Matrix Display with Bluetooth support


LED matrices are a popular mean of displaying text, graphics, and animated information at gas stations, convenient stores, and many other public places. Raj’s new project is about making a Bluetooth-enabled 8×64 LED matrix display, where you can send the text messages through a smartphone over a Bluetooth connection. He used Arduino as the main controller and an HC-06 Bluetooth adapter to receive data from the smartphone. He has shared all of his design files and Arduino firmware on his blog.

DIY LED Matrix Display with Bluetooth support – [Link]