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* Q: What will the voltage at A_IN be? What are the upper and lower values?
* Q: The important part of this sketch is the line where the microprocessor reads the analog input: <code> val = analogRead(potPin); // read the value from the sensor</code> * Q: Looking at the Arduino help for that function (<code>analogRead()</code>), what do you think the value <code>val</code> will be for those highest and lowest voltages at your A_IN pin?
* Q: How can you verify your guess? Try and verify your values, in some plausible manner. Anything goes!!
