The PCA9685 16 Channel 12Bit PWM Servo Motor Driver Module
Power input terminal
Green power indicator
In the 4 groups of 3-pin connector to facilitate the insertion of 16 servo motor (servo motor plug slightly wider than 0.1 “)
The polarity of the reverse polarity is input on the terminal block, All PWM output lines have a 220 ohm series resistor protection and can easily drive LED.