16 Channel 12 bit PWM / Servo Driver I2C

The 16-Channel 12-Bit PWM / Servo Driver Module based on the PCA9685 is an I2C-controlled PWM generator that lets you control up to 16 PWM outputs using just two pins from a microcontroller (SDA & SCL). It’s ideal for driving multiple servos, LEDs, or other PWM-controlled devices without tying up precious GPIO pins.

This module is widely used in robotics, automation, LED lighting effects, and embedded systems when many PWM channels are needed — especially with Arduino, ESP32, ESP8266, and Raspberry Pi projects.

🔹 Key Features

1. 16 independent PWM outputs
2. 12-bit resolution (4096 steps per cycle) for fine control
3. I2C communication (uses only two pins: SDA & SCL)
4. Multiple modules can be chained with unique I2C addresses
5. Operates from 3.3V to 5V logic (motor/servo supply separate)
6. External power supply for servos/motors to avoid microcontroller overload
7. Onboard oscillator for stable PWM frequency
8. Works with common libraries (like Adafruit PWM/Servo library for Arduino)

🔹 Applications

1. Independent control of up to 16 servos (robots, animatronics, pan/tilt rigs)
2. LED brightness control and lighting effects
3. Multi-channel PWM control in automation projects
4. Driving RGB lights (as multiple PWM outputs)
5. Complex motion control with minimal microcontroller pins
6. Expansion of PWM channels on microcontrollers with limited GPIO