This is a -in PWM driver and a clock using i2c communication. This means this will be very different from the TLC5940 series. You 't need to constantly send signals to occupy your microcontroller! It is 5V , which means you can also control it with a 3.3V microcontroller and safely drive it to the 6V output (3.4+ positive voltage is also ok when you want to control the white or blue LEDs) The 6 address select pins allow you to up 62 driver boards on a single i2c bus, for a of 992 PWM outputs. would be a very resource. About 1.6Khz adjustable frequency PWM output to output 12-bit resolution for stepper motors, which means 4us resolution at 60Hz rate Configurable push-pull or open-circuit output Output enable pin quickly disables all outputs The PCA9685 chip is wrapped in the center of the small board input terminal Green indicator It is convenient for you to insert 16 servo motors at a time in 4 sets of 3-pin connectors (the plug of the servo motor is slightly wider than 0.1inch, so you can put 4 pairs of 0.1inch connectors) Input reverse polarity protection on terminal block Cascade design Put a capacitor on the V+ line (you will need it in some cases) The peripheral input voltage depends on this 10V1000uf capacitor Put a 220 ohm series resistor on all PWM output lines to and drive LED easily. Colour: blue Material: PCB Size: 60x25mm Package Contents: 1 * Servo driver board Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.