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Hey,

I am new to Arduino and have a question. I am working on a project to take a white board that we use at work, and replace all the "fill in the blanks" with led numbers/text. From the research I have done, this is def doable with Ardrino, but thats about as far as I've gotten.

What I really need to know before I start on this project is weather there is an effective way to run multiple seven-segment displays (http://en.wikipedia.org/wiki/Seven-segment_display) or if they all have to be run individual. If there is a way to do this, could someone point me in the correct direction, as I have spent some time researching this and found little help. I don't know if its just because I'm new at this and don't know where to look, or if it is just not as easy as I had hoped.

Also, when I first started brainstorming this project I had the idea to use the old-schoolish split-flap modules (http://en.wikipedia.org/wiki/Split-flap_display) but could not find anywhere to purchase the individual modules. Does anyone know where I could pick some of these up?

Thanks in advance for any help!!

Mattwaab
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Multiplexing, latches, shift registers... and a bit of imagination. smiley
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I remember that giant split flap board at Penn Station new york, i loved just watching the thing do its thing , i have never come across those for sale but sounds like more work then simple leds/led displays.
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Arduino can drive directly 4 7-segments, look in playground-outputs for library.
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Look into a max7219
it does all the multiplexing work for you and can control 8 7segment displays
and it uses spi so you can have as many chips as chip select pins you have available
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You need something like this?
add two more digits, and you have the equivalent of what a MAX7219/7221 does, with the multiplexing control moved back into the arduino and the current limiting done externally. 


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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
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