My friend Jules asks:
The aim is to get as many servo motor controls as possible – looks like the maximum an Arduino will output is 14?
Digital I/O Pins54 (of which 14 provide PWM output)
I guess then it becomes a software issue to synchronise multiple Mega boards?
– ie 14 x 14 array using 14 boards
Best Answer
I would also go for same route todbot suggested. However since I am a big fan of I2C I am using SD21 servo controller which can drive 21 servos. If you need even more there is SD84 servo controller which can drive (you guessed it) 84 servos.