jferg:
I'm building a project which will locate a max232 on an arduino mega prototyping shield. experience suggests that the 5 volt supply on the mega won't be enough AND I need 12 volts from some things that will be connected to the shield. There will be an lm 7805 on the shield to produce 5 volts, along with some caps, resistors and some other devices.Has anyone come up with a slick way to get +12 from the mega, or Uno for that matter to a shield?
Obviously there could be another jack and plug, but since it's already there why not use it?
Well a lot depends on how you are going to power the Arduino mega board in the first place. If you are going to use a +12vdc 1 amp wall wart type supply to the mega board to power the board, then that same +12vdc voltage source is avalible on the Vin pin on the power shield connector and thus avalibe for use on an attached shield proto-board.
Is that a possible solution?
Lefty