The 850 Expansion Board plugs into the Expansion Port on the back of the 850 Universal Interface. It is a break-out of all the connections available through the back port including eight digital input/output ports, three voltage inputs, three DC power supplies (3.3 V, 5 V, ±12 V), and access to the three front signal generators. The Expansion Board also includes a circuit breadboard that students can build their own circuits on. In addition, students can do sense and control experiments using Blockly in Capstone to control this board.

Any sensors that plug into the front of the 850 Universal Interface can be used simultaneously with the sensors that are available through the back Expansion Port of the 850.

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