16 Channel 12-Bit PWM/Servo Driver-I2C interfce PCA9685 AA217

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  • Communication Interface: IIC.
  • 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.
  • Adjustable frequency PWM up to about 1.6 kHz; Configurable push-pull or open-drain output manufacturer.
  • 12-bit resolution for each output – for servos, that means about 4us resolution at 60Hz update rate.

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It’s an I2C-controlled PWM driver with a built-in clock. That means that, unlike the TLC5940 family, you do not need to continuously send it to signal to tie up your microcontroller, it’s completely free running!
Output enable pin to quickly disable all the outputs.
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.
“Chain-able” design.
A spot to place a big capacitor on the V+ line.
330-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.

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