16-Channel 12-bit PWM/Servo Driver w/ I2C interface

  • Product ID: 264
  • MPN: ADA815
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Description

Do you need to drive a lot of servo motors to make your robot work? Or wanna drive LEDs with PWM? Then you need this breakout because Arduino and similar boards have only a few PWM pins. Following are the bunch of features of this This Breakout by Adafruit:

  • 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 signal tying up your microcontroller, its 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 60Hz update rate
  • Configurable push-pull or open-drain output
  • 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
  • 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 so that your can chain 62 of these to control unto 992 PWN outputs
  • 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
  • This PWM/Servo Driver breakout board is powered by PCA9685 chip by NXP Semiconductors and uses I2C 7-bit address between 0x60-0x80, selectable with jumpers.

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