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16 Channel PWM Servo Control Board

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This 16 Channel PWM Servo Control Board is a versatile module that allows you to control up to 16 servos using only 2 pins via I2C communication.
SKU: Z6493
$22.68
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This 16 Channel PWM Servo Control Board is a versatile module that allows you to control up to 16 servos using only 2 pins via I2C communication. Whether you’re building a robot, animatronic project, or any application that requires precise servo control, the PCA9685 16-Channel Servo Driver is an excellent choice. It simplifies servo management and frees up valuable pins on your microcontroller.

Features

  • The PCA9685 offers 16 fully programmable PWM outputs with a 12-bit resolution, providing 4096 steps for precise duty cycle adjustments on each channel.
  • The module uses the I2C bus for communication, ensuring easy integration with microcontrollers like Arduino or Raspberry Pi.
  • Supports frequency control across all 16 channels, programmable between 24Hz and 1526Hz.
  • The duty cycle (pulse width) can be fine-tuned from 0% to 100% for accurate output control.
  • The on-board PWM controller manages all 16 channels independently, reducing processing load on the microcontroller compared to direct pin-based servo control.
  • Multiple modules can be daisy-chained together. With up to 62 boards on a single I2C bus, you can control up to 992 servos using just two pins.

Specifications

General:

  • Dimensions: Without headers or terminal block: 2.5 x 25.4 x 3mm
  • Weight Without headers or terminal block: 5.5g
  • Weight With 3x4 headers and terminal block: 9g
  • Built-in Clock: Free-running PWM driver, eliminating the need for continuous microcontroller signals
  • Output Control: Output enable pin for quickly disabling all outputs
  • LED: Green power-good LED for easy diagnostics
  • Space: Ideal for adding a large capacitor on the V+ line to stabilize power input

Power Input:

  • Terminal block with reverse polarity protection
  • Optional 0.1" breakout pins for flexible power connection

I2C Interface:

  • 7-bit address range: 0x60–0x80, selectable with solder jumpers
  • Connects to microcontrollers (e.g., Arduino) with 4 lines; 5V -> VCC, GND -> GND, SDA (data) and SCL (clock)

PWM Outputs:

  • 16 channels with 3-pin connectors grouped in sets of 4
  • Each output includes 220-ohm series resistors for protection and easy LED control
  • Configurable as push-pull or open-drain output

PWM Resolution and Frequency:

  • 12-bit resolution per channel (4096 steps)
  • Adjustable PWM frequency up to 1.6 KHz
  • ~4µs resolution at a 60Hz update rate (ideal for servos)

Addressable and Chainable:

  • Features 6 address select pins
  • Supports daisy-chaining of up to 62 boards on a single I2C bus
  • Total of 992 outputs can be controlled (ideal for large servo or LED projects)

Voltage Compatibility:

  • 5V compliant: Safe to use with 3.3V microcontrollers while driving outputs up to 6V
  • Supports LEDs with higher forward voltages (e.g., white or blue LEDs at 3.4V+)

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