Micro Vibration Motor Drives using Micro-controllers(shrinking Arduino)

I am planning to work on a project where I require to give a positional vibration into 3 different places. Workable are of my project is approx 12mm width and 17mm curved surface. Motor has to be placed inside of tow layers of that area.

My concern is about using Arduino where it seems to be large to fit in to this place so what is the suitable micro-controller that would do the job for me. smaller the size of the circuit would do better.

FYI, I am planning to use Pico Vibe 6mm motor and Arduino Lily Pad to give a PWM output according to a selected input (switch).


"Pico Vibe 6mm Motor(Motor)":https://catalog.precisionmicrodrives.com/order-parts/product/306-103-6mm-vibration-motor-12mm-type

http://en.wikipedia.org/wiki/List_of_Arduino_boards_and_compatible_systems
long list of boards, a few are about as small as you can get (not much larger than the processor) that may work for you,
cheers,
Richard