I'm working on a project where I'll need + and - 5v DC on a shield. I'm trying to find the "simplest" way to do this, assuming we have standard Arduino pins available - so, the +5v is easy - just use the Arduino's regulated 5v.
But what about -5v? I have the regulated 5v, plus the unregulated Vin to work with. I'd like to do this with the lowest parts count and physical space possible. Ideas anyone?