Changes

from [[Electronic Technologies for Art]]

== Analog Input ==

* now... driving it with input data, instead of with a loop.

* 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 way. Anything goes!!!

=== other loads ===

==== photoresistor ====

* Q: With the same R2 resistor (10k) from above, replacing R1 with the photoresistor, what range of voltages (and corresponding data values) would you expect to see at your A_IN pin?

* Q: Using methods you invented above, verify your data readings.

==== strain gauge ====

==== ultrasonic rangefinder ====