Re: Charlie-plexing
Ah perception, what a wonderful thing. When I said digital I meant the logic, and when you said analog you meant the properties of the LED. LOL
I had found that article on google but didn't see anything new at first glance and moved on. It's really a few pages deep that it gets into the meat of the matter. Excellent article though, explained everything so clearly.
I especially appreciate how he discusses making a pin input disables it. I never understood "high impedance state". It's simple, it impedes, like that 10M resistor he has on his schematic of the input pin.
It also explains why I couldn't get a decent reading on my Saleae probe; current DOES flow through the unwanted LEDs. It's just that they don't get enough current to light up; hence the importance of forward voltage drop you mentionned (he explains that clearly). It's nice understanding what's going on.
No ghosting with 200usec delay:
No pauses:
Robert
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