Using a MicroWave Sensor

Small, inexpensive microwave sensors are available that do a super job of detecting movement of people or objects by bouncing radio waves off of them.
This video show how you can use such a sensor to trigger a microcontroller or relay.
More information is on my web page here:

http://www.trainelectronics.com/MicrowaveRADARSensor/index.htm

Видео Using a MicroWave Sensor канала Dave Bodnar