PCA9685 16‑Channel 12‑Bit PWM/Servo Driver (I²C Interface)

The PCA9685 16‑Channel 12‑Bit PWM/Servo Driver is a powerful I²C‑controlled module designed for precise control of multiple servos, LEDs, or PWM devices. With 16 independent channels and 12‑bit resolution (4096 steps), it enables smooth motion control and accurate brightness adjustment.
Widely used in robotics, automation, LED lighting, and hobby projects, this driver board offloads PWM generation from the microcontroller, allowing efficient multitasking and simplified programming. Compatible with Arduino, Raspberry Pi, ESP32, STM32, and other I²C‑enabled controllers, it is ideal for complex projects requiring multiple servo or LED outputs.

Specifications

• Chipset: PCA9685 (NXP)
• Channels: 16 independent PWM outputs
• Resolution: 12‑bit (4096 steps)
• PWM Frequency: Adjustable up to ~1.6 kHz
• Control Interface: I²C (address configurable with jumpers)
• Operating Voltage: 2.3V – 5.5V (logic)
• Output Drive: 5V tolerant, suitable for servos and LEDs
• Current Capability: Depends on external power supply (servo motors require dedicated supply)
• Dimensions: Compact breakout PCB (~62mm × 25mm typical)
• Compatibility: Arduino, Raspberry Pi, ESP32, STM32, PIC, ARM, etc.
• Applications: Servo control, robotics, LED dimming, automation systems

Features

• 16‑channel PWM control with 12‑bit resolution
• I²C interface for easy integration with microcontrollers
• Offloads PWM generation from main MCU, freeing resources
• Adjustable frequency for servos, motors, and LEDs
• Stackable design – multiple boards can be chained via I²C
• Compatible with popular platforms (Arduino, Raspberry Pi, ESP32, STM32)
• Ideal for robotics, automation, and LED lighting projects
• Compact and reliable PCB design

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