Description
Description
The PCA9685 16-Channel PWM Servo Motor Controller Board is a versatile and powerful solution for projects requiring multiple PWM outputs, such as robotics, automation, or advanced lighting systems. Based on the NXP PCA9685 controller chip, this board communicates via the I²C interface, requiring only two data pins (SDA and SCL) from your microcontroller (like Arduino, Raspberry Pi, or ESP32) to manage all 16 channels simultaneously. A key feature is the integrated clock, which allows the connected devices to operate without continuously tying up your microcontroller’s processing power.
Each of the 16 channels offers a precise 12-bit resolution (4096 steps), allowing for very smooth and accurate control of servo positions or LED brightness. The PWM frequency is adjustable from approximately 24 Hz to 1526 Hz, making it suitable for both standard 50-60 Hz servos and higher-frequency LED dimming applications.
The board is designed for flexibility and expandability. It features a chainable design with address selection pins, allowing up to 62 boards to be connected on a single I²C bus, controlling a potential total of 992 outputs. The board includes a terminal block for an external power supply (up to 6V, typically 5V for most servos) to power the attached devices, ensuring that high-current loads do not strain the host microcontroller’s power supply. The pre-soldered pins offer a convenient, plug-and-play experience, ideal for both hobbyists and professionals.
Features
- 16 Independent Channels: Provides 16 dedicated PWM outputs, each with its own independent ON/OFF time and duty cycle control.
- I²C Communication: Uses only two I/O pins (SDA, SCL) to control all 16 channels, freeing up valuable microcontroller pins.
- Integrated Clock: Built-in 25 MHz internal oscillator means no continuous signal is needed from the host microcontroller, reducing overhead.
- High Resolution: Offers 12-bit (4096 steps) resolution for each channel for precise control.
- Adjustable Frequency: Programmable PWM frequency range from 24 Hz to 1526 Hz.
- Wide Compatibility: 5V compliant inputs/outputs allow control from 3.3V microcontrollers (like Raspberry Pi) while safely driving up to 6V outputs for LEDs or servos.
- Chainable Design: Up to 62 modules can be connected in series on a single I²C bus, offering massive scalability for large projects (up to 992 outputs).
- External Power Input: Features a terminal block for a separate external power source (e.g., 5-6V for servos) to handle high current requirements with reverse polarity protection.
- Pre-Soldered Pins: Comes with all necessary header pins pre-soldered for ease of use and quick setup.
- Output Protection: Each PWM output line has a 220-ohm series resistor for protection and ease of driving LEDs.
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