Specification:

Features:

• Drives up to 16 servos with a single module

• Uses only 2 pins (I2C) from the microcontroller

• Chainable: Up to 62 modules → control 992 servos!

• Built-in oscillator and hardware PWM – offloads work from microcontroller

• Excellent for robotic arms, hexapods, LED dimming, etc.

• Precision Servo Control:12-bit resolution ensures smooth, 
  
• accurate servo movements for intricate applications.
  
• Extensive Compatibility:Supports up to 62 units, 
  
• expanding to 992 PWM outputs, making it ideal for complex projects.
  
• Versatile I2C Interface:The I2C interface allows 
  
• seamless integration with Arduino, Raspberry Pi, and other microcontrollers.
  
• Robust Power Management:Features reverse polarity protection 
  and a power-good LED for reliable voltage handling.
  
• Pca9685 12v|I2c Driver|High-Capacity PWM Outputs:With 16 channels, 
  
• this PCA9685 driver enables precise control over a wide range of PWM outputs.

Description:

PCA9685 16-Channel 12-bit PWM/Servo Driver Module – I2C Interface for Arduino, Raspberry Pi & DIY Robotics Projects

The PCA9685 16-Channel 12-bit PWM/Servo Driver Module is a high-performance, versatile PWM controller that allows users to control up to 16 independent channels of PWM (Pulse Width Modulation) signals using just two I2C communication lines. It is specifically designed to simplify complex servo and motor control systems for developers, hobbyists, and engineers working on projects involving robotics, lighting, automation, and IoT systems.

This module is based on the NXP PCA9685 chip, a powerful I2C-bus controlled PWM driver with a built-in clock. It eliminates the need to constantly send signals from the microcontroller to maintain PWM output, allowing your Arduino, Raspberry Pi, ESP8266, ESP32, or any other I2C-compatible microcontroller to handle other tasks simultaneously.

⚙️ KEY FEATURES

• 16 Independent Channels: Supports 16 PWM output channels, ideal for controlling multiple servo motors or LEDs individually.

• 12-Bit Resolution: Offers a 12-bit resolution for each output (4096 levels), ensuring smooth and precise control of angles in servos and brightness in LEDs.

• I2C Interface: Uses the standard I2C protocol. You only need two lines (SDA & SCL) to communicate, freeing up other pins on your microcontroller.

• Adjustable Frequency: PWM frequency can be adjusted from 24Hz to 1526Hz, making it suitable for both servo motors (usually 50Hz) and high-speed LED dimming.

• Onboard Oscillator: Comes with a built-in clock generator, eliminating the need to provide an external PWM clock signal.

• Chainable Design: With configurable I2C addresses, up to 62 driver boards can be connected on a single I2C bus, controlling a total of 992 PWM channels.

• Power Supply Support: Includes a terminal block for external 5V power input, which is essential when powering multiple servos or high-current devices.

📦 TYPICAL USE CASES

The PCA9685 module is ideal for any application where multiple PWM signals are needed, particularly when precise control or a large number of outputs are required.

• Robotics: Perfect for controlling robot arms, legs, and grippers using servo motors.

• Animatronics: Enables smooth and realistic motion for face and body movements.

• LED Lighting: Controls dimming or RGB effects in LED arrays or strip lights.

• RC Models: Manage multiple channels

Certainly! Here's an expanded continuation of the detailed description for the PCA9685 16-Channel 12-bit PWM/Servo Driver, covering applications, technical specifications, connection instructions, and use case examples:

Common Applications (Continued)

• LED Dimming and Light Shows:
  With its high-resolution PWM output, the PCA9685 is ideal for controlling the brightness of LEDs with smooth transitions. It's widely used in RGB LED matrices, light bars, backlighting systems, and artistic installations, enabling custom patterns, fades, and pulsing effects.

• Robotics and Mechatronics Projects:
  The module is a go-to choice for building complex robotic systems where multiple actuators need precise control. Projects like quadruped robots, humanoid arms, pan-tilt camera mounts, or even DIY animatronics often depend on the PCA9685 for synchronized movement.

• IoT and Automation Systems:
  Use it to control relays, valves, or other actuators in home automation, smart agriculture, or industrial control applications.

• CNC and 3D Printer Modifications:
  In hobby CNC machines and modified 3D printers, it can manage additional fans, lighting, or even axis motors under PWM regulation.

Technical Specifications

Powering the Module

• Logic Power (VCC): Connect to the 3.3V or 5V output of your microcontroller depending on logic level compatibility.

• Servo Power (V+): Connect an external 5V–6V power supply capable of delivering sufficient current for all connected servos. Use a common ground between the microcontroller and the external power source.

⚠️ Do not power servos directly from the microcontroller; always use a dedicated power supply to avoid voltage drops or damage.

Pinout Description