PCA9685 16-Channel PWM Servo Driver – I2C Module for Arduino

The PCA9685 is a 16-channel PWM servo driver module that lets you control a large number of servo motors or LEDs from a single Arduino board over the I2C bus. Instead of tying up many pins on your controller, you drive all 16 channels using just two data lines, which keeps your wiring simple and frees up your board for other tasks. It is a popular choice for robotics arms, pan-tilt camera rigs, walking robots, automated project builds, hobby electronics, and smart-garden control projects where several actuators need to move together.

Key features

• 16 independent PWM output channels on one compact board.
• I2C interface — control everything with only two data pins.
• Designed to work smoothly with Arduino and other common microcontrollers.
• Each channel can drive a servo motor or an LED with adjustable PWM.
• Boards can be chained together to expand to more channels.

Typical uses

• Multi-servo robotic arms and grippers.
• Pan-tilt mounts for cameras and sensors.
• Hexapod and quadruped walking robots.
• LED dimming and lighting effects in DIY projects.
• Automation and educational electronics kits.

How to choose / tips

• Confirm your project needs PWM control for several servos or LEDs at once.
• Use a separate power source for the servos so they do not load your Arduino.
• Check the I2C address if you plan to stack more than one board.
• Standard libraries make wiring and code quick to set up.

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