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							Deer Repellent #2:  Here is a simple sensor, 
							which can detect the seismic vibrations caused by a 
							person or large animal walking nearby. A 
							representative application for the sensor is a deer 
							repellent for the vegetable garden. When a deer 
							steps near the sensor a loud buzzer or beeper sounds 
							for a few seconds startling the would-be vegetable 
							thief away.  |