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Blinkie work
Nov. 22nd, 2010 08:21 pmThe charlieplexing code is now 100% working. I'm getting some ghosting but that's a circuitry problem and I suspect that it actually has to do with the prototyping board that I'm using. Next time I work on this, I'm going to take the chip off and put it directly on the board and see if the ghosting remains. If it does I have some head scratching to do because my code is pretty much identical to other code I've seen online.
I'm going to order up some Tiny85 chips - I ordered Tiny13s because that's what I'm familiar with, but the Tiny85 is the same chip with 8x as much RAM, which means probably 20x more patterns (lots of the first chunk of RAM will be taken by just the basic code, not pattern code). The difference is only 25 cents ($1.33 versus $1.08). Total parts for this unit may be as low as $3, though the board will probably cost a couple of bucks.
I'm going to order up some Tiny85 chips - I ordered Tiny13s because that's what I'm familiar with, but the Tiny85 is the same chip with 8x as much RAM, which means probably 20x more patterns (lots of the first chunk of RAM will be taken by just the basic code, not pattern code). The difference is only 25 cents ($1.33 versus $1.08). Total parts for this unit may be as low as $3, though the board will probably cost a couple of bucks.
