Louis Daniel Frenzel

Louis E. Frenzel Jr. was an American engineer, editor, and author known for writing approachable books on electronics and communication systems. McGraw Hill author information says he worked as a Technology Editor for Electronic Design beginning in 2000 and covered wireless, communications, networking, and test and measurement, drawing on more than 30 years of experience in geophysical, aerospace, and computer engineering.

Before joining Electronic Design, he also taught electronics and semiconductor courses as a college professor. Across his career he wrote numerous books for learners and practitioners, including Electronics Explained, Practical Electronic Design for Experimenters, and Principles of Electronic Communication Systems, a text that reached multiple editions and became one of his best-known works.

A memorial published in January 2023 notes that Lou Frenzel Jr. died on January 9, 2023, at age 84. He is remembered not only for his technical expertise, but also for a warm, practical style that helped generations of readers build confidence in electronics.