I want to drive 12 unit 8x8 Bicolor LED DotMatrix. What is the algorithm for this ? I just want color change. Red to Green or Green to Red. Not same time displaying. Maybe with blue.
i have a related proyect 'bout dot matrix 'but its's for 8051 with driwing technics..
I need a little help to build my basic system for 8051 (i don't like the xternal RAMs and ROMs) if you're interested, reply me quicknow.
"I just want color change. Red to Green or Green to Red. Not same time displaying. Maybe with blue."
I think that there is maybe a need for further explanation.
It is a bit uncommon to have a LED matrix where all LEDs are always on, and the individual "pixels" just changes between red and green.
But the most interesting thing is how to optionally get the two-color displays to support (red,green,red+blue,green+blue). It is four combinations, but not the usual combinations for a two-color LED, and a 3-color led would have 8 combinations...
But the most interesting thing is how to optionally get the two-color displays to support (red,green,red+blue,green+blue). It is four combinations, but not the usual combinations for a two-color LED, and a 3-color led would have 8 combinations... 1) many more combinations are possible with PWM from red through yellow to green 2) in your "binary analysis" you forget that one is black 3) the OP needs to be more specific
more words do not make you appear stupid, they make you appear precise.
Erik
i don't like the xternal RAMs and ROMs then get the RAM and flash you need internally:
http://www.keil.com/dd/search_parm.asp
also, this does not make sense: What is the algorithm for this ? ... i have a related proyect 'bout dot matrix 'but its's for 8051 with driwing technics.. you do not knjow and you have????
again: "more words does not make you appear stupid"
"1) many more combinations are possible with PWM from red through yellow to green"
Yes, more shades are possible. The OP seems to have specified red xor green or possibly a gradient from red to green or the reverse. Exact interpretation impossible, since the post was too fuzzy. I did select to write an answer based on the red xor green interpretation.
"2) in your "binary analysis" you forget that one is black"
I most definitely did not forget black. I noted 8 combinations for a three-color LED, and was wondering where the blue would come from in a two-color red/green LED.
I was listing the combinations that the OP seemed to be thinking about: "I just want color change. Red to Green or Green to Red" which seems to imply one of two alternatives: A) Exacly one LED is always on. B) He want to be able to gradually change from red to green or from green to red.
"3) the OP needs to be more specific"
Most definitely so.