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→photoresistor
[[Image:Photoresistor.JPG|400px]]
* taking take the photoresistor from your 147A kit, which has a resistance between 140k - 800, depending on your lighting conditions.
* 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: How could you make this more sensitive? There are least three ways to try... think in terms of the physical enclosure around the sensor, the hardware setup (a voltage divider), and the software (look at File->Sketchbook->Analog->Calibration...)
