This article details the construction and use of the 555-timer checker. The 555-timer checker allows the user to dynamically check a 555-timer, an integrated circuit device. Of its many applications, it provides timing applications that unijunction transistors once performed. (Contains 4 figures and 3 photos.)

Students in the Electronics Engineering Technology program at Pennsylvania College of Technology designed and built a computerized dynamometer platform for testing dc brushless motors. As the capstone experience for EET-320, Measurement and Tests course, students were divided into teams of four and were given three weeks to complete the project.…