As you can tell by my topic, this is an ambitious project. I've read the FAQs, topics, and such, and I'm sure this topic has come up before, so I'll try and make it unique. Apologies in advance if I'm asking questions that can be found in these forums.
I'm creating a 196x32 RGB Led matrix. Before getting down to buying the components, I would like to propose the architecture and receive feedback:
Here's the scope: 196x32 matrix = 6272 led's.
I've decided to use PWM to control the color of each LED. I would use cascading shift registers to drive each led individually. This would essentially require 4 outputs from the arduino: 3 for the modulation of the red, green and blue, and 1 for the data being sent to the shift register.
I'm concerned with driving each LED individually. that it would not be able to achieve the refresh rate required for smooth transitions. Each LED would be on for a very small amount of time, and on top of that, it would be modulated. Since only one LED is on at a time, the desired color would be affected as the intensity of each color (RGB) would be dropping to 0 and back up each time the LED is selected/deselected.
Am I making any sense or am I completely in left field? I've read the article on Charlieplexing, but I'm going to read it again.
Thanks in advance,