The radio waves are actually high-frequency AC signals. An antenna wired to a high-frequency oscillator can transmit radio waves. The oscillator's frequency is usually 100 KHz or higher. In addition to transmitting high-frequency AC signals, the antenna converts the radio waves into electromagnetic waves as well. Electromagnetic waves travel at the speed of light, which is approximately 3×108 m/s. Upon an antenna receiving a transmitted electromagnetic wave, high-frequency current is created. The created current in the antenna is just a fraction of the transmitting signal. The information in this electromagnetic wave has some electrical signal data, such as frequency, voltage field, magnetic field, and waveform characteristics (sine, square, triangle, and so on). An example of an electromagnetic wave is shown here:
Arduino Electronics Blueprints
Arduino Electronics Blueprints
Overview of this book
Table of Contents (17 chapters)
Arduino Electronics Blueprints
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Free Chapter
A Sound Effects Machine
Programmable DC Motor Controller with an LCD
A Talking Logic Probe
Human Machine Interface
IR Remote Control Tester
A Simple Chat Device with LCD
Bluetooth Low Energy Controller
Capacitive Touch Sensing
Arduino-SNAP Circuit AM Radio
Arduino Scrolling Marquee
Index
Customer Reviews