Microchip’s rfPIC microcontroller family includes the 18-pin rfPIC12C5O9AG which features an integrated 315/433MHz ASK transmitter, and the 20-pin rfPIC12C5O9AF which features an integrated 315/433MHz ...

Using this circuit, audio musical notes can be generated and heard up to a distance of 10 metres. The circuit can be divided into two parts: IR music transmitter and receiver. The IR music transmitter ...

What if a doorbell never needed a battery and still sent signals wirelessly over long distances. This design can turn every ...

This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The ...

This book sets down, in nearly 1,000 pages, the greater part of the war-time course given to U.S. officers at the Cruft Laboratory, Harvard University. The range of material included is necessarily ...