PCA9685 16-Channel PWM & Servo Driver Module (I2C Interface)

Product Overview

The PCA9685 16-Channel PWM & Servo Driver Module is a powerful solution for projects that require multiple PWM outputs without overloading your microcontroller. Whether you’re building a robotic arm, hexapod robot, RC project, LED lighting system, or automation setup, this module allows you to control up to 16 PWM channels using only two I2C communication pins.

Powered by the highly reliable PCA9685 chip, the module generates PWM signals independently, reducing the processing burden on your controller. Unlike software-generated PWM, the onboard oscillator ensures accurate and stable output signals while freeing your microcontroller for other tasks.

For larger projects, multiple boards can be connected together. With six address selection pins, up to 62 modules can share a single I2C bus, enabling control of as many as 992 PWM outputs from one controller.

Key Features

• Control up to 16 PWM outputs using only two I2C pins
• High-precision 12-bit PWM resolution (4096 steps)
• Dedicated hardware PWM generation with onboard clock
• Supports servo motors, LEDs, ESCs, and other PWM devices
• Adjustable PWM frequency up to approximately 1.6kHz
• Compatible with both 3.3V and 5V microcontrollers
• Supports cascading up to 62 modules on a single I2C bus
• Configurable push-pull or open-drain outputs
• Output Enable (OE) pin for instant shutdown of all channels
• Built-in reverse polarity protection
• Green power status indicator LED
• Designed for easy servo connections and expansion

Why Choose the PCA9685 Module?

Microcontrollers often have a limited number of PWM pins, making large robotics or lighting projects difficult to manage. The PCA9685 solves this challenge by providing 16 independent PWM channels controlled through a simple I2C interface.

Because the PWM generation is handled by dedicated hardware, your microcontroller remains available for sensor processing, communication tasks, and other application logic, resulting in smoother and more efficient system performance.

Applications

• Multi-servo robotic systems
• Robotic arms and humanoid robots
• RC vehicles and aircraft
• LED dimming and lighting control
• Home automation projects
• Animatronics
• CNC and motion control systems
• Arduino, ESP32, Raspberry Pi, and STM32 projects

Technical Features

• I2C-controlled PWM driver with integrated oscillator
• 7-bit I2C address selectable via solder jumpers
• Address range configurable for multiple modules
• 220Ω protection resistors on all output channels
• Dedicated terminal block power input
• Space provided for optional bulk capacitor installation
• Servo-friendly grouped output headers
• Reverse polarity protection for safer operation

Specifications

Package Includes

• 1 × PCA9685 16-Channel PWM & Servo Driver Module (I2C Interface)