This book is about devices commonly called sensors. The invention of a microprocessor
has brought highly sophisticated instruments into our everyday lives.
Numerous computerized appliances, of which microprocessors are integral parts,
wash clothes and prepare coffee, play music, guard homes, and control room temperature.
Microprocessors are digital devices that manipulate binary codes generally
represented by electric signals. Yet, we live in an analog world where these devices
function among objects that are mostly not digital. Moreover, this world is generally
not electrical (apart from the atomic level). Digital systems, however complex and
intelligent they might be, must receive information from the outside world. Sensors
are interface devices between various physical values and electronic circuits who
“understand” only a language of moving electrical charges. In other words, sensors
are the eyes, ears, and noses of silicon chips. Sensors have become part of everyone’s
life. In the United States alone, they comprise a $12 billion industry.
has brought highly sophisticated instruments into our everyday lives.
Numerous computerized appliances, of which microprocessors are integral parts,
wash clothes and prepare coffee, play music, guard homes, and control room temperature.
Microprocessors are digital devices that manipulate binary codes generally
represented by electric signals. Yet, we live in an analog world where these devices
function among objects that are mostly not digital. Moreover, this world is generally
not electrical (apart from the atomic level). Digital systems, however complex and
intelligent they might be, must receive information from the outside world. Sensors
are interface devices between various physical values and electronic circuits who
“understand” only a language of moving electrical charges. In other words, sensors
are the eyes, ears, and noses of silicon chips. Sensors have become part of everyone’s
life. In the United States alone, they comprise a $12 billion industry.
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