LCDInfo.com • View topic - Building LED sign tutorial

View unanswered posts | View active topics

Board index » LCDInfo 0.6-> » General discussion

All times are UTC + 2 hours

Building LED sign tutorial

Page 1 of 1

[ 2 posts ]

Print view

Previous topic | Next topic

Author

Message

imigyjunia

Post subject: Building LED sign tutorial

Posted: Mon Sep 05, 2011 8:40

Joined: Mon Sep 05, 2011 8:31
Posts: 1
Location: Shanghai

It would be amazing to have a scrolling LED sign display board to keep you up to date on e-mails, news, weather, or stock quotes. Here I recommend a microcontroller project tutorial that shows 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.
DIY Marquee LED Array Display
LED Wiring Plan

Physical Construction

Top

Barb12

Post subject: Re: Building LED sign tutorial

Posted: Tue Jan 03, 2012 8:04

Joined: Fri Dec 30, 2011 15:43
Posts: 3

This is a really cool project!
I have a question. If I want to glow only LED (2,2), I must set row 2 at 0 V and column 2 at 5 V (so that current will flow through the LED). Also, other rows- 1,3,4 and 5 should be set to 5 V and columns 1,3,4 and 5 to 0 V. But now all LEDs except the ones in row 2 and column 2 are reverse-biased with 5 V reverse voltage. Most LEDs have maximum reverse voltage of 5 V. Is it safe to use this design?

Top

Page 1 of 1

[ 2 posts ]

Board index » LCDInfo 0.6-> » General discussion

All times are UTC + 2 hours

Who is online

Users browsing this forum: No registered users and 2 guests

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum