LED limits on Teensy 3.1
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PaulStoffregen
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I have personally tested 4320 LEDs (540 per pin) on a Teensy 3.1. It worked great, with quite a bit of extra CPU time free. Details here:
http://community.arm.com/groups/embedded/blog/2014/05/23/led-video-panel-at-maker-faire-2014
So far, I have not heard of any confirmed reports of anyone actually trying to push close to the theoretical 8864 LED limit. If you do try it, please report your results?
But really, few people have much motivation to risk push those limits. Teensy 3.1 and the Octo28 board are inexpensive compared to 4000+ LEDs, and power supplies, and other building materials normally used. It's easy to focus on the Teensy part, because it's so important from a technology point of view. But in terms of cost and size, it's usually the smallest part of any large LED project.
http://community.arm.com/groups/embedded/blog/2014/05/23/led-video-panel-at-maker-faire-2014
So far, I have not heard of any confirmed reports of anyone actually trying to push close to the theoretical 8864 LED limit. If you do try it, please report your results?
But really, few people have much motivation to risk push those limits. Teensy 3.1 and the Octo28 board are inexpensive compared to 4000+ LEDs, and power supplies, and other building materials normally used. It's easy to focus on the Teensy part, because it's so important from a technology point of view. But in terms of cost and size, it's usually the smallest part of any large LED project.
PaulStoffregen
Well-known member
Well, one obvious problem would be memory, if you're using OctoWS2811.
If ledsPerPin is 2000, those 2 arrays are more than Teensy 3.1's entire RAM. This won't even compile. Did you try?
There are also physical electrical challenges with such long strips, which are independent of Teensy or any software.
It's difficult to help you without knowing more context behind these questions. Do you even have the 30+ meters of LEDs, or are these questions purely preliminary planning before you've even purchased anything? Do you have the LEDs wired up, partially working, or not working at all, or giving you some specific type of trouble?
Code:
DMAMEM int displayMemory[ledsPerPin*6];
int drawingMemory[ledsPerPin*6];If ledsPerPin is 2000, those 2 arrays are more than Teensy 3.1's entire RAM. This won't even compile. Did you try?
There are also physical electrical challenges with such long strips, which are independent of Teensy or any software.
It's difficult to help you without knowing more context behind these questions. Do you even have the 30+ meters of LEDs, or are these questions purely preliminary planning before you've even purchased anything? Do you have the LEDs wired up, partially working, or not working at all, or giving you some specific type of trouble?
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