Resistive Sensors
Michael L. Gasperi, Philippe “Philo” Hurbain · Apress eBooks · 2009
Resistive sensors are an example of a NXT passive-type sensor. The term passive sensor sounds like it could be an oxymoron. After all, how could anything that senses also be passive? The term is a carryover from the old RCX days when there were only two types of sensors: those that required a power supply and those that didn’t. You probably figured out that passive sensors were the type that didn’t. The contact sensors you learned about in Chapter 4 were also passive sensors.