The Raspberry Pi is a wonderful little computer, but one thing it isn't very good at is controlling DC Servo Motors - these motors need very specific and repetitive timing pulses to set the position. Instead of asking the Pi Linux kernel to send these signals, pop on this handy HAT! It adds the capability to control 16 Servos with perfect timing. It can also do PWM up to 1.6 KHz with 12 bit precision, all completely free-running.
It has an I2C interface which means, with just 2 pins, you can not only control 16 servos, but can also stack up to 62 of these to control 992 servos. Also adafruit has provided with python libraries to get you started right away.Works with Rapsberry Pi 2, B+ and A+. The hat mounts over the Raspberry Pi using GPIO female sockets. Please note that it does not come with a Raspberry Pi and needs a 5-6V power supply.