Support Thread for RGB matrix 8*8 60mm

[manton]

@atomriot

whats the need to power them all at once? you could simulate that by just cycling through them faster than the eye can notice. that way you can stay under the large power requirements and not have to have extra hardware to turn them all on at once.

The problem here is that the current requirements stay the same if you want the same brightness. When multiplexing, you really need to increase the drive current to the LEDs. For instance, if the LED is only on 25% of the time, you need to raise the peak current by a factor of 4 to achieve the same brightness. The average current will be the same regardless of whether the LED is directly driven, or multiplexed.

The only advantage to multiplexing, is to save output drivers, and to simplify the wiring. For large arrays, multiplexing is the only practical way.

Mike