The IES-SHIELD-SCX18 is an eighteen  channel RC servo driver with advanced servo control features. Specifically targeted at the Arduino UNO board user [all other Arduino boards supported] and the Raspberry-Pi. The IES-SHIELD-SCX18 features high speed I 2 C communication for easy project integration and smooth speed control.
Once connected each servo can be positioned (with speed control), enabled, reversed and soft-started by simply writing a value to an internal register over the connected I2 C interface.
The IES-SHIELD-SCX18 caters for the majority of servos by providing a wide pulse width range of 0.50mS to 2.50mS with 8uS per step accuracy and also provides global activation of new servo position, soft-start & movement complete registers for superior control.
The IES-SHIELD-SCX18 provides dual high power regulators capable of supplying 5V @ 3A to the connected servos from an external Li-Pol or Ni-MH battery pack of 7.2 to 8.4V and features a disable link to allow the use of low voltage battery packs of 3.6 to 4.8V. The on-board I2C pull-ups are jumper configurable to allow disconnection when connecting to the Raspberry-Pi, which has its own pull-ups.