RANGKAIAN SAKLAR SENSOR ULTRASONIK

This is alternate wireless switching using ultrasonic sensor. The distance of switching range should be more than 10 meters.Circuit of a new type of remote control switch is described here. This circuit functions with inaudible (ultrasonic) sound. Sound of frequency up to 20 kHz is audible to human beings. The sound of frequency above 20 kHz is called ultrasonic sound. The circuit described