DIY LED Array Text Display Marquee

Ever wanted to have one of those big scrolling LED displays, to keep you up to date on e-mails, news, weather, or stock quotes? In this video, we'll show you how to build an array of 120 LEDs, how to control them all from one microcontroller, and how to talk to it from your computer.

For more details, see
http://www.nerdkits.com/videos/ledarray2/

Category:

Science & Technology

Tags:

• LED
• array
• display
• charlieplex
• multiplex
• diode
• microcontroller
• project
• nerdkits
• atmel
• avr
• atmega168
• lcd
• news
• weather
• stock
• quotes
• ticker
• betabrite
• interrupt
• handler
• marquee
• grid

[martinkjlarsson]

@envisionelec It's NOT Charlieplexing. Charlieplexing uses the micro controller's ability to have three states (tri-state: Input, HIGH, LOW). With Charlieplexing you could control 272 LEDs with 17 pins.

[nrdesign1991]

NICE idea! I think I can learn a lot from you guys

[thedarkmatterplanet]

code??

[selambekodok]

i've try to make this text display bigger by double the led on every column, just as in your explanation. but i cannot light up both led on a point on the same time. how do i light up both of it? PLEASE HELP ME :(

[29riteshkakkar]

nice work....

[Josh350]

thank you for explaining! I've started to understand what high low and all those other codes mean.

[envisionelec]

It's called Charlieplexing. Google.

[UserIsAnFBIAgent]

Cool video, I wanna make an LED Monitor, But maybe I should try doing a marque display first.

[crashgibson1]

Very cool idea for anyone wanting to do anything with LED's...Thank you.