I'm currently building a sonar running off an arduino. My radar includes an ultrasonic sensor that will detect the distance an object is sitting at, and a servo motor that the sensor will sit on top of. I was wondering if it was at all practical to use a PIR sensor with this setup so that the radar will be able to detect people instead of just inanimate objects. I'm worried that while rotating, the sensor might just constantly stay high if it sees any moving person.
I have no prior PIR sensor experience and that is why I was hoping someone with some experience could let me know if this is worth pursuing or if will be too much of a problem.
The range of this sonar isn't too important. Although I would like it if it could scan several meters, under 1 meter would still be fine.