16 Channel RC Servo Driver with I2C Interface

  • Rajkumar Sharma
  • 143 Views
  • easy
  • Tested
  • SKU: EL140867
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This is a 16-channel servo driver that can drive 16 x RC servos over I2C interface. The project is built using PCA9685 chip, a 16-channel PWM generator that can drive 16-channel servos simultaneously. The board can be connected to Arduino or another microcontroller. Driving robots, and animatronics puppets is easy with this board. The board works with 5VDC and a separate power supply connector is provided to power the RC servo with 6VDC. 6 x address Solder jumper is provided to set the board address, and this helps users to wire up 62 board on a single I2C line and drive up to 992 servos. The board also can be used for other applications that require 16-channel PWM signals. The frequency can be adjusted between 24 Hz to 1526 Hz and the duty cycle ranges from 0 to 100%.

It is important to use a high current power supply that should be able to power the total load of 16 servos and use a C4 = 1000uF/10V capacitor. You can also download the Arduino code to test the board. The test is done with Arduino UNO. The following Arduino pins are used to perform the test, refer to the connection diagram for the connection between Arduino Uno and the PWM board.

Arduino Uno Connections

Features

  • Power Supply RC Servo 6V DC (VDD)
  • Power Supply Chip/Logic 5V DC (VCC)
  • 3 Pin x 16 Header Connector for 16 RC Servo
  • Screw Terminals for RC Servo (6V DC) RC Servo Power Supply
  • 5 Pin Header Connector for I2C Interface and VCC Power
  • On Board Power LED
  • 6 Solder Jumper to Set the I2C Address
  • 66 Board can run over a single I2C Bus which can output 992 Channels
  • Adjustable Frequency 24 Hz to 1526 Hz
  • Adjustable Duty Cycle 0 to 100%
  • Configurable Push-pull or Open-drain Output
  • Output Enable Pin to Disable All the Outputs
  • 4 x 3mm Mounting Holes
  • PCB Dimensions 44.13 x 34.45mm

Applications

  • Animatronics
  • Puppetry
  • Multi-Servo Based Robots
  • Hexapod Robot
  • Servo-Based Robotics Arm
  • Automation

Connections and Other Details

  • Jumper J1 = Address A0
  • Jumper J1 = Address A1
  • Jumper J1 = Address A2
  • Jumper J1 = Address A3
  • Jumper J1 = Address A4
  • Jumper J1 = Address A5
  • CN1 1 x16Pin = PWM 0-15
  • CN2 1x16Pin = VDD=6V
  • CN3 1x16Pin = GND
  • CN4: Pin 1 VCC(5VDC), Pin 2 = SDA, Pin 3 = SCL, Pin 4 = OE(Enable), Pin 5 = GND
  • CN5: Pin 1 VDD(6VDC) for Servo, Pin 2 GND
  • D1 Power LED

Schematic

Parts List

NOQNTYREFDESCMANUFACTURERSUPPLIERSUPPLIER PART NO
13CN1,CN2,CN316 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5327-ND
21CN45 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5318-ND
31CN52 PIN SCREW TERMINAL PITCH 5.08MMPHOENIXDIGIKEY277-1247-ND
41C110uF/10V CERAMIC SMD SIZE 0805YAGEO/MURATADIGIKEY
52C2,C3100nF/25V CERAMIC SMD SIZE 0805YAGEO/MURATADIGIKEY
61C41000uF/10V ELECTROLYTICPANASONICDIGIKEYPCE3868CT-ND
71D1LEDOSRAMDIGIKEY475-1278-1-ND
82D2,D3DNP
96J1,J2,J3,J4,J5,J6JUMPERSOLDER JUMPER
101R11K 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
119R2,R3,R4,R5,R6,R7,R8,R9,R1010K 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
1216R11 TO R26220E 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
131U1PCA9685DWNXPDIGIKEY568-11925-1-ND

Connections

Gerber View

Photos

Videos

PCA9685 Datasheet

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