By Willem de Moor Editor components Feedback Build your own LED table Thousand LEDs and wires




We can hardly imagine that someone who has ever played with electronics never connected a led to a battery. If you want to do that a little tidy, you put a resistance between them to limit the current and not let your LED burn. For many, that will be the first step in hobbies with electronics and it is not for nothing that the standard project for Arduino, the hello world of the microcontroller world is the Blink program. With this super-soft program you leave the LED that is standard on most Arduino-compatible boards, you guessed it, blinking.

As is often the case, a single flashing LED will not be enough for many people. Controlling a single LED via i / o pins is a gateway drug to more; before you know it, you send a very strict LED, or a complete screen. Then we are of course talking about an LED screen, such as the large advertising screens outside or scoreboards. The pixels thereof are in fact separate LEDs. Now, of course, displays consist of bizar lots of LEDs. A little display has hundreds of thousands to millions of pixels, which is difficult to control with home-garden-and-kitchen hardware and to provide prick.

What we can do is create a modest matrix, or display if you like, with an Arduino or Raspberry Pi, and display images, animations or even a game on a pixel display of a thousand pixels. Especially for retro images, such a matrix lends itself perfectly, because 8-bit images quickly fit on a limited number of pixels. We look at the options to create and manage such a matrix.


In: A Technology & Gadgets Asked By: [23225 Red Star Level]

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