I'm playing around with a few project ideas and I think I'd like to build an LED marquee sign. Probably 8 rows by a large number of columns (80 columns perhaps).
Searching through google and these forums I've received a few insights. This webpage has been of help as well:
So, here's how I understand it:
* 1 8bit port of the microcontroller will control the 8 rows of the display. These will probably be buffered with mosfets or an led-driver.
* Each column will be controlled by one pin of a register shifter (probably hc595).
So to make this work, only one column will be lit at any given time. Does this sound right or am I missing a key part of this concept?