You can experience some drift during the first minute of operation. The dot on the chip is located in the same corner as the VCC pin on the board. The refernce orientation of X, Y and Z axes is pictured below. The data stream can be observed using Serial Monitor in Arduino IDE. The estimated orientation data is sent by the Arduino board using serial protocol. You can use zip ties or velcro straps to fix the parts in place. The Arduino board can be attached to the side of the headband. The wires should be oriented towards left ear side.
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