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I saw this instructable: DigitalAnalog-Clock-Arduino-PaperCraft , and I thought that using 28 servos for the effect was a bit expensive and overkill, when tiny home-made solenoids could do the task for a fraction of the cost and space. However, I'm not willing to kill my Arduino with back-EMF, even if my tiny solenoids might not produce enough to worry about.
I thought that a tiny h-bridge, meant for low-voltage and low-amperage use for very light-weight applications, might be good to have.
V1 is small, about 1 inch by 1 inch, but I think I can do better. I want it TINY.