{"product_id":"pca9685-16-channel-12bit-pwm-servo-driver-i2c-arduino-raspberry-pi","title":"PCA9685 16-Channel 12-Bit PWM Servo Driver — I²C, Arduino, Raspberry Pi, Robot Arm","description":"\u003ch2\u003ePCA9685 16-Channel 12-Bit PWM Servo Driver — I²C, Arduino \/ Raspberry Pi\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003ePCA9685\u003c\/strong\u003e module provides \u003cstrong\u003e16 independent PWM output channels\u003c\/strong\u003e with \u003cstrong\u003e12-bit resolution\u003c\/strong\u003e (4096 steps) via a single \u003cstrong\u003eI²C interface\u003c\/strong\u003e. It offloads all PWM timing from the MCU, freeing up GPIO pins and CPU cycles. Up to \u003cstrong\u003e62 modules can be chained\u003c\/strong\u003e on one I²C bus (via address jumpers), enabling control of up to \u003cstrong\u003e992 servo channels\u003c\/strong\u003e from a single Arduino or Raspberry Pi.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDriver IC\u003c\/td\u003e\n\u003ctd\u003ePCA9685 (NXP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePWM Channels\u003c\/td\u003e\n\u003ctd\u003e16 independent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePWM Resolution\u003c\/td\u003e\n\u003ctd\u003e12-bit (4096 steps per cycle)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePWM Frequency\u003c\/td\u003e\n\u003ctd\u003e24Hz – 1526Hz (programmable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI²C (address 0x40–0x7F, 62 addresses)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLogic Supply (VCC)\u003c\/td\u003e\n\u003ctd\u003e3.3V – 5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eServo Power (V+)\u003c\/td\u003e\n\u003ctd\u003eSeparate terminal (5V–6V for servos)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Current (per channel)\u003c\/td\u003e\n\u003ctd\u003e25mA (LED drive) \/ external driver for servos\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temperature\u003c\/td\u003e\n\u003ctd\u003e−40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChainable Modules\u003c\/td\u003e\n\u003ctd\u003eUp to 62 (992 total channels)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhy Choose PCA9685?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e16 Channels, 2 Wires\u003c\/strong\u003e — Controls 16 servos using only SDA + SCL from the MCU\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12-Bit Resolution\u003c\/strong\u003e — 4096 steps per PWM cycle for smooth, precise servo positioning\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChainable\u003c\/strong\u003e — 62 modules on one bus = 992 servo channels for large robot arms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeparate Servo Power\u003c\/strong\u003e — V+ terminal powers servos independently from logic supply\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdafruit Library\u003c\/strong\u003e — Full Arduino and Python (Raspberry Pi) library support\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTypical Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRobot arm with 6–16 servo joints (Arduino\/Raspberry Pi)\u003c\/li\u003e\n\u003cli\u003ePan-tilt camera gimbal (2–3 servos)\u003c\/li\u003e\n\u003cli\u003eHexapod robot leg control (18 servos)\u003c\/li\u003e\n\u003cli\u003eRC vehicle steering and throttle servo control\u003c\/li\u003e\n\u003cli\u003e16-channel LED PWM dimmer (R\/G\/B LED arrays)\u003c\/li\u003e\n\u003cli\u003eAnimatronic face and puppet control\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eArduino Library \u0026amp; Setup\u003c\/h3\u003e\u003cp\u003eInstall \u003cstrong\u003eAdafruit PWM Servo Driver Library\u003c\/strong\u003e. Connect SDA→A4, SCL→A5, VCC→3.3V\/5V, GND→GND. Power servos via V+ terminal (separate 5V\/6V supply).\u003cbr\u003e\u003ccode\u003epwm.begin(); pwm.setPWMFreq(50); \/\/ 50Hz for servos\u003c\/code\u003e\u003cbr\u003e\u003ccode\u003epwm.setPWM(channel, 0, pulseLength); \/\/ Set servo position\u003c\/code\u003e\u003c\/p\u003e\u003ch3\u003eServo Pulse Calculation\u003c\/h3\u003e\u003cp\u003eAt 50Hz: pulse range = 150 (0°) to 600 (180°) in 12-bit counts.\u003cbr\u003eFormula: \u003ccode\u003epulseLength = map(angle, 0, 180, 150, 600);\u003c\/code\u003e\u003c\/p\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Can PCA9685 power servos directly?\u003c\/strong\u003e\u003cbr\u003eA: The onboard regulator powers the IC logic only. Servos must be powered via the V+ screw terminal from an external 5V–6V supply capable of the required current (typically 500mA–1A per servo).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I change the I²C address?\u003c\/strong\u003e\u003cbr\u003eA: Solder the A0–A5 address jumper pads on the board. Each combination sets a unique address from 0x40 to 0x7F.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1× PCA9685 16-Channel 12-Bit PWM Servo Driver Module\u003c\/li\u003e\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":46991497789675,"sku":"\u003cnone\u003e","price":12.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/pca9685-16ch-pwm-servo-driver.webp?v=1761534940","url":"https:\/\/keszoox.com\/products\/pca9685-16-channel-12bit-pwm-servo-driver-i2c-arduino-raspberry-pi","provider":"Keszoox","version":"1.0","type":"link"}