Datasheet

The Adafruit 16-Channel 12-bit PWM/Servo HAT will drive up to 16 servos or PWM outputs

over I2C with only 2 pins. The on-board PWM controller will drive all 16 channels

simultaneously with no additional Raspberry Pi processing overhead. What's more, you can

stack up to 62 of them to control up to 992 servos - all with the same 2 pins!

https://learn.adafruit.com/adafruit-16-channel-pwm-servo-hat-for-

raspberry-pi

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