IV$.$ Reading an Analog Input via MATLAB

This lab requires up to two different power sources, $+5$ V and $+12$ V $.$ The $5-$volts is used for the potentiometer and the optical proximity sensor$.$ The $12$ volts is used for the DC motor. If your kit does not have a $12-$volt supply and $12-$volt DC motor, you may either use a $5-$ or $9-$volt DC motor $($with appropriate power supply$)$ or a $5-$volt micro servomotor as in prior labs.

$1.$ Set the power supply to be in independent mode, and the output of the power supply to be $+12$ V $($or whatever is needed for your motor$).$

$2.$ Build a potentiometer circuit that can generate a voltage output between $0$ and $5$ volts $($see Figure $2).$ Connect the wiper out to an analog input port of the Arduino board. Be sure that you also connect the ground connection from power supply to the Arduino board. Use a DMM $($digital multimeter$)$ to verify the range of output voltage.

$3.$ Connect the output signal to an analog input pin of your Arduino board and write a program using a while loop to show the status continuously. Remember to initialize your MCU board.

For example:

while $1$

AnalogIn $($a$,$ channel$)$

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