The principle used in most encoders (linear or rotational) is the same: an optical device. We shall study two types of rotational encoders briefly. Figure 3.12 shows an incremental encoder.
Amy McDougall/Barone (Monica Horan) becomes Robert Barone's second wife (in season 7), and is the best friend of Debra, who introduces her to Robert. A recurring character for the first seven seasons of the series, Amy became essentially a regular cast member for the remainder of the show's run.
Betsy Randle. Amy Matthews is the mother of Eric, Cory, Morgan, and Joshua and a main character in all seven seasons of Boy Meets World. She married Alan at the age of 19, and is still happily married. She is probably the calmest family member and always offers advice to her husband and children.