A product for Arduino that works with official Arduino boards. - This is a i2c-controlled PWM driver board with a built-in clock， which is quite different from TLC5940 series. You don’t need to continuously send signals and occupy your MCU. - 5V compatibility which means that you can use 3.3V MCU to control and drive the output up to 6V (when you want to control the white or blue indicator light 3.4V+ is also OK). - 6 address select pins allow you to connect 62 driver boards to one i2C bus total 992 channels of PWM output. - About 1.6KHz frequency modulation PWM output. - Get 12-bit resolution output ready for stepping motor which means that the 60Hz update rate can reach to 4us resolution. - Configurable totem-pole output or open-collector output. - Output enable pin can quick disable all outputs. - PCA9685 chip is at the center of the board. - With power input terminal. - With green power indicator light. - Convenient to insert total 16 servos at the same time (the plug of servo is a little large than 0.1" so you can put 4 pairs of 0.1" connectors). - With reverse polarity protection for input. - Cascade design. - Put a bulky capacitor on the V+ line (sometimes you need it). - Put 220 ohm resistance components onto all PWM output lines so as to protect them and you can easily drive the LED.