Adafruit featherwing add ons for all feather boards adafruit 2928 the adafruit 8 channel pwm or servo featherwing add ons use only the 2 x i2c signals from your feather microcontroller mcu plus power to run 8 x servos or leds with 12 bit pwm theyre the same diminutive size as all the feather main boards and featherwings just right for making compact projects that can stand up to their bigger cousinsonce you send an i2c command to one of these boards it takes over and maintains the pwm