PCA9685 module 16 Channel 12-bit PWMServo Driver-I2C interface Raspberry pi shield servo shield
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This board/chip uses I2C 7-bit address between 0x60-0x80, selectable with jumpers
Terminal block for power input (or you can use the 0.1" breakouts on the side)
Reverse polarity protection on the terminal block input
Green power-good LED
3 pin connectors in groups of 4 so you can plug in 16 servos at once
(Servo plugs are slightly wider than 0.1" so you can only stack 4 next to each other on 0.1" header
A spot to place a big capacitor on the V+ line (in case you need it)
220-ohm series resistors on all the output lines to protect them, and to make driving LEDs trivial
Solder jumpers for the 6 address select pins
i2c-controlled PWM driver with a built-in clock. Unlike the TLC5940 family,
you do not need to continuously send it signal to tie up your microcontroller, it's completely free running!
It is 5V compliant, which means you can control it from a 3.3V microcontroller
and still, safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4+ forward voltages)
6 address select pins so you can wire up to 62 of these on a single i2c bus, a total of 992 outputs - that's a lot of servos or LEDs
Adjustable frequency PWM up to about 1.6 kHz
12-bit resolution for each output - for servos, that means about 4us resolution at the 60Hz update rate
Configurable push-pull or open-drain output
Output enable pin to quickly disable all the outputs
1 x PCA9685 16-Channel 12-bit PWM Servo Motor Driver I2C Module For Arduino