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Direct linkHarman, Charles – Tech Directions, 2009
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.)
Descriptors: Electronic Equipment, Time Management, Performance Technology, Electromechanical Technology
