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Topic: 6 digit 7 Segment display - TPIC6B595 schematic component? (Read 6 times) previous topic - next topic

johnhuebbe

I'm having trouble using the PPS on the GPS unit to trigger an interrupt.  I posted a new question here: http://arduino.cc/forum/index.php/topic,154776.0.html  if anyone wants to follow along/help.

johnhuebbe

As an update, I bought a few different kinds of LEDs to see which ones I like best.  I got some of the Cree 5-mm Red 3000mcd - 12000mcd high luminous intensity LEDs.  Holy crap those things are bright.  I could barely look at them outdoors, much less indoors running at 20mA. I think I still see spots. :smiley-eek-blue:

CrossRoads

I have some 5mm ultrabright white LEDs - am only running them at 2-3mA due to the brightness. Wow!
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.
Arduino for Teens available at Amazon.com.

johnhuebbe

I'm starting to layout some components for my displays.  Are there any pros or cons for placing the 595's?  Should I group all of them together on a board and then run 8 LED drain wires to each of my 7 segment displays?  Or, place 1 595 at each 7 segment display and run 3 wires (MOSI, SS, SCLK) from the arduino to each display?

CrossRoads

Having them all on one board and then running a ribbon cable to each display is a nice clean way to go, keeps your SPI signals all in 1 place.
Essentially this:
http://www.crossroadsfencing.com/BobuinoRev17/
bare boards available for $6 mailed to US locations.
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.
Arduino for Teens available at Amazon.com.

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