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Week 3 Lab

3 bytes removed, 07:10, 13 April 2009

→‎Potentiometer

=== Potentiometer ===

[[Image:Pot_in.png]]

* A_IN can be any of the Analog pins (0-5) on your Freeduino.

* Q: What will the voltage at A_IN be? What are the upper and lower values?

* 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!!

 

=== other loads ===

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Rtwomey

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