This chapter will cover data acquisition in experimental physics. Microcontrollers offer an inexpensive way to acquire data from analog and digital sensors. Interfacing microcontrollers to sensors along with data analysis using Excel will be the focus of this chapter.
17.1 RESISTIVE SENSORS
Physical quantities such as light, temperature, force, and humidity can be measured by sensors, whose resistances are sensitive to these quantities. Examples include resistive temperature devices (RTDs), light sensitive resistors (photoresistors or photocells), force sensors, and strain gauges (Figures 17.1–17.4). All of these sensors exhibit a dramatic drop in resistance as the light, temperature, force, ...
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