🔧 Specifications
Product Name:
16-Channel PWM Servo Driver Board – PCA9685 I²C Interface Module
Designed for robotics and motion control applications, this module is based on the PCA9685 PWM driver IC and provides 16 independent PWM outputs via a simple I²C interface. It is ideal for controlling multiple servos, LEDs, or other PWM-driven devices with high precision and minimal microcontroller overhead.
PWM Channels: 16 independent outputs
Driver IC: PCA9685
Resolution: 12-bit (4096 steps per channel)
PWM Frequency Range: 40 Hz – 1 kHz (adjustable)
Interface: I²C (2-wire communication)
Addressing: 6 hardware address pins (up to 62 modules chainable)
Daisy Chain Support: Yes (expandable for large projects)
Output Drive: Push-pull / open-drain configurable
Built-in Clock: Internal oscillator (external clock input supported)
Low CPU Usage: Offloads PWM generation from microcontroller
Logic Supply Voltage (VCC): 2.3 V – 5.5 V
Servo Power Supply (V+): Up to 6 V (external supply recommended for servos)
Logic Level Compatibility: 3.3 V and 5 V systems
Output Current (per pin): Up to 25 mA (sink), 10 mA (source)
Max Supply Current (IC): ~4.2 mA (no load)
Frequency Stability: ±50 ppm
Operating Temperature: −40 °C to +85 °C
Communication Protocol: I²C (standard mode up to 100 kHz, fast mode up to 400 kHz)
Default I²C Address: 0x40 (configurable via A0–A5 pins)
Control Pins: SDA, SCL
Power Pins: VCC (logic), V+ (servo power), GND
Outputs: 16 × PWM channels via 3-pin headers (GND, V+, Signal)
Board Dimensions: Approx. 62 × 25 mm (common module size)
Mounting: PCB with mounting holes
Connector Type: Standard 3-pin servo headers
Height: Approx. 20 mm (including headers)
Weight: Lightweight PCB module
Reverse Polarity Protection: Typically supported on V+ (module dependent)
Decoupling Capacitors: Onboard for stable power delivery
Signal Integrity: Clean PWM output with minimal jitter
Thermal Performance: Low heat generation under normal load
Reliability: Designed for continuous operation
Robotics (robot arms, hexapods, RC builds)
Servo motor control systems
LED dimming and lighting control
Automation projects
Arduino, Raspberry Pi, ESP8266/ESP32, STM32 development
DIY electronics and embedded systems