PCA9685 16-Channel PWM Driver | I2C Control
PCA9685 16-Channel 12-bit PWM Driver Module
The PCA9685 is an I2C-controlled PWM driver capable of generating 16 channels of 12-bit resolution signals. It is commonly used to drive servos, dim LEDs, or control other devices requiring precise timing. Its ability to offload PWM generation from a microcontroller makes it ideal for complex multi-channel projects.
Key Specifications
| Specification | Value |
|---|---|
| Channels | 16 |
| Resolution | 12-bit (4096 steps) |
| Frequency Range | 24 Hz to 1526 Hz |
| Interface | I2C (up to 1 MHz) |
| Logic Voltage | 3.3V ā 5V |
| Output Voltage | Up to 6V (V+ terminal) |
What You Can Build With This
- Robotic arm with up to 16 servo motors
- LED mood lighting with smooth fades
- Pan-tilt camera control system
- Animated holiday props with synchronized motion
Compatibility
This module works with any microcontroller that has I2C support, including Arduino Uno/Mega, Raspberry Pi, ESP32, and STM32. It operates at 3.3V or 5V logic levels, making it safe for both 3.3V and 5V systems. Common pairings include standard hobby servos and 5V LED strips.
Wiring Notes
Connect VCC to the system logic supply (3.3Vā5V) and V+ to an external power source for the controlled devices (up to 6V). SDA and SCL lines typically require pull-up resistors; most breakout boards include them. For servos, ensure the external supply can handle the total stall current.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Raspberry Pi?
Yes, the PCA9685 uses the standard I2C interface, which is available on all Raspberry Pi models. You can control it using Python libraries like Adafruit_CircuitPython_PCA9685.
How many servos can it control?
Each PCA9685 module can control up to 16 servos independently. You can daisy-chain up to 62 modules on the same I2C bus for larger projects.
Does it require an external power supply?
Yes, the V+ terminal must be connected to a separate power source (5ā6V) to power the servos or LEDs. The logic circuitry is powered via the VCC pin from your microcontroller.
š¦ Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document ā step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
What you can build with this
Shipping Information
- Prepaid Orders: ā¹75 for orders up to ā¹999, FREE shipping above ā¹999
- COD Orders: ā¹125 shipping + ā¹50 COD fee = ā¹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items