Since it is easy to SINK current with an NPN transistor or N-Channel MOSFET it makes sense to use Common Cathode LEDS and SOURCE drivers. Then you can SOURCE 20 mA of power from each of 300 output pins and SINK the 6A (300 anodes * 20 mA each) for each layer with a single transistor.
What would a basic setup for this be so I can learn and then possibly scale it up? Also and NPN transistor supplies current through it once I apply the voltage to the gate one it, correct? Does a MOSFET do the same?
He decided to use STP16 chips and software to handle the pwm instead of going with the TLC5940. Would that be a better option or which would allow for smoother transitions in the animations?
You could use as1130 as this drives up to a 11x12 matrix.so use 10 drivers and thats it.
upload a new animation to the TLC5940...
if not then where would they be stored
Quote from: hey101 on Jan 20, 2013, 06:01 pmif not then where would they be storedI think I already posted on that subject.
You said using an arduino uno or mega would not be able to hold more than a couple of seconds and that reading an sd card wouldn't work well.
Quote from: hey101 on Jan 20, 2013, 10:16 pmYou said using an arduino uno or mega would not be able to hold more than a couple of seconds and that reading an sd card wouldn't work well. ...wouldn't work well with software PWM.
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