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Price: $19.90
Availibility: Back Order   
Item #: RO-902-0084-020


This item is currently out of stock. Your order will be shipped when all items in your order are in stock. Read about product status here

The Open CM9.04 B is an open source micro-controller from ROBOTIS powered by the 32-bit ARM Cortex-M3 processor. Any 3-pin DYNAMIXEL servo using the TTL communication protocol can be used with the OpenCM9.04-B. With plenty of processing power, this controller is a great choice for robot building using multiple servos!

Each kit includes:
  • 1 x OpenCM9.04-B micro-controller
  • 2 x 20 pin male header row
  • 2 x 20 pin female header row
  • 1 x USB micro-B cable
  • 1 x Instruction manual

Program the board using the free ROBOTIS OpenCM software, an easy to use Integrated development environment (IDE) based on the Arduino IDE. Arduino users should be right at home. The OpenbCM9.04-B can be be powered and programmed over USB but remember: servos cannot be powered through the USB connection and must be powered separately.

Compatible servos:

The OpenCM9.04-B is not a replacement for the OpenCM9.04-C board used in the DARWIN MINI. That controller can not currently be purchased separately. It is also not compatible with the new R+ Motion 2.0 software package. Individual XL-320 servos can be always be used with the OpenCM9.04-B and the OpenCM software.


Controller Model OpenCM9.04-B
CPU STM32F103CB (ARM Cortex-M3)
Operating Voltage 7-16 V (5 V programming only over USB)
External I/O Pins 26
Timers 8
Analog In Pins (ADC) 10 (12 bit)
Flash 128 kB
SRAM 20 kB
Clock Speed 72 MHz
USB 2.0 Full Speed Ports 1
I2C (TWI) 2
Debug JTAG & SWD
TTL Port (3-Pin) 4
External Sensor Ports (5 Pin) 4
Dimensions 27 x 66.5 mm
Weight 13 g

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