Port splitter for NXT. (SPLIT-Nx)

• NXT compatible sockets
• Can be connected to either Sensor Port or Motor Port
• Attach upto three sensors or motors to one Port Splitter
• Can cascade other Port Splitters (plug one port splitter in another splitter)
• Can connect only digital sensors
• Supports NXT-G, NBC, RobotC

Attaching sensors
The SPLIT-Nx Port Splitter supports digital sensors with changeable I2C addresses. The SPLIT-Nx does not support analog sensors.
While attaching ensure that each sensor has a unique I2C address preset.
You can connect upto 124 digital sensors to the NXT using multiple SPLIT-Nx Port Splitter modules.

Supported Sensors:

• Magnetic compass for NXT (CMPS-Nx)
• Multi-sensitivity Acceleration Sensor for NXT (including all variants)
• RCX to NXT Communication Adapter (NRLink-Nx)
• Motor Multiplexer for NXT (MTRMX-Nx)
• Sony PlayStation 2 Controller interface for NXT (PSP-Nx)
• LEGO Ultrasonic Sensor (only one can be used)
• High Precision Infrared distance sensor for NXT (all variants)
• 8 Channel Servo Controller for NXT (NXTServo)
• Vision Subsystem for NXT (NXTcam-v2)

Note: The maximum current drawing capacity of the NXT sensor bus is approx 100mA. While attaching multiple sensors, ensure that the total current drawn by your sensors is within this limit.

Using Port Splitter in your IDE
In your program, accessing the sensor is based on it's I2C address, (each sensor must have unique I2C address).
Attach the port splitter to the NXT on any port (say port 1).
In your program, use the respective sensor's icon (or API as the case may be), and for the parameters, use the port of the port splitter (port 1 in above example) and I2C address of the attached sensor from which you wish to take a reading.

Note about attaching motors
Up to three motors can be attached to the SPLIT-Nx. Turning a motor port ON through the NXT program will turn all the attached motors ON at once.

This is useful if you need to run all motors at once, however independent control of each attached motor is not possible and encoder values of the motors cannot be used. i.e. rotation control feature of motor blocks cannot be used.

Also note that the power supplied to the motors will be limited by the power coming from the NXT brick.

More about the encoder value: The values read by the NXT will be Logical AND operation of the encoder values of all attached motors. For simple programs such a value is not of much use.