Thomas Petruzzellis is an electronics engineer currently working at the geophysical laboratory at the State University of New York, Binghamton. Also an instructor at Binghamton, with 30 years' experience in electronics, he is a veteran author who has written extensively for industry publications, including "Electronics Now, Modern Electronics, QST, Microcomputer Journal, " and "Nuts & Volts." Tom wrote five previous books, including an earlier volume in this series, "Electronic Sensors for the Evil Genius." He is also the author of "Create Your Own Electronics Workshop; STAMP 2 Communications