Polyglot and Crossroads,
Alright, you've convinced me that 12v is the way to go!
I'm a bit uneducated on the subject -- But how would I go about getting both 12v and 5v into the project? It looks like the arduino runs at 5v and the ring LEDs are prewired (with resistors) for 5v (although the inner digit LEDs are not wired at all). Would it be best to use a step-up circuit to move 5v up to 12v, or should I start with a 12v power supply and step down to 5v?
Or a different method all together?
Thanks!
Andrew