TCA9548A i2c expander
This is the i2c multiplexer. I created a small board so that I can connect the wires easily. Each header contains gnd,vcc and two sda/scl buses. The cable that is black, red and white goes to a servodriver in the right arm. i2c is a serial protocol where you send an address first to tell what device you want to use, and then the commands it should execute. Many i2c devices are now supported in MyRobotLab and the list is growing. Example of supported devices are accelerometer/gyro, A/D converter, I/O expander, OLED display, servodriver, i2c multiplexer.