Normally, it’s not easy to control DC Servos using a Raspberry Pi, because the motors require well timed pulses in order to work properly. This new 16-Chanel PWM/Servo HAT from Adafruit makes it easy!
No need to fut around with the Linux kernel. Just pop on the HAT and you’ll be able to precisely control up to 16 servos.(The HAT can also handle PWM up to 1.6 KHz with 12 bit precision.)There’s no additional Raspberry Pi processing overhead, and you can stack up to 62 HATs to control up to 992 servos — should the need arise! Adafruit even provides a Python library, to make it even easier to get your bots moving properly.
The kit ($17.50) can be used with Raspberry Pi Model A+, B+, or Pi 2. Note that you’ll still need to buy the Pi, servos and 5V power supply seperately.