Nik Amat, Nik Azrini
(2002)
Ultrasonic switch / Nik Azrini Nik Amat.
[Student Project]
(Unpublished)
Abstract
My project is about ultrasonic switch. This circuit functions with inaudible (ultrasonic) sound. As with any other remote control system, this circuit too comprises a mini transmitter and a receiver circuit. The ultrasonic transmitter uses a 555. while the ultrasonic receiver used CA 3140.
The output from receiver is connected to the electrical appliances such as lamp and etc. to activated that equipment. In my project, I using a LED to display the produced the output
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