HiLetgo PCA9685 16-Channel PWM Servo Driver
16 servo channels over two I²C wires, with a dedicated servo power terminal.
Best for: Any arm with 3+ servos
Controllers & Servo Drivers
HUAREW PCA9685 16-Channel PWM Driver (2-Pack)
by HUAREW
★ Best for: Large or dual-arm builds
Two PCA9685 boards — keep a spare or chain them for 32 channels.
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Why we recommend it
A two-pack of the PCA9685 driver, which is genuinely useful: chain the two boards over I²C and you have 32 PWM channels for a large or dual arm, or simply keep the second as a spare (the screw terminals and headers are the parts most likely to need re-soldering on a heavily-used board). Same 12-bit, 16-channel design as the single boards, compatible with Arduino and Raspberry Pi.
At a glance
| Quantity | 2 boards |
|---|---|
| Channels | 16 each (chainable) |
| Resolution | 12-bit PWM |
| Interface | I²C |
Guides that use this
Code & electronics
Arduino Robotic Arm Code: Sketches, Library & Examples
Copy-paste Arduino robotic arm code: Servo library setup, sweep tests, potentiometer and serial control, record/playback, smooth motion, and PCA9685.
Parts & hardwareHow to Power a Robotic Arm (Without Frying Your Board)
Pick the right robotic arm power supply, size current from servo stall draw, wire a common ground, and stop brownouts that reset your Arduino or Pi.
Compare with
SunFounder PCA9685 16-Channel Servo Driver
PCA9685 driver from a known education brand — works with Arduino and Raspberry Pi.
Best for: Raspberry Pi arms