Found in a 1964 Electronic Design, this circuit makes use of FETs of the time. These transistors can be replaced by modern general-purpose types. The input resistance is 30 M.
This monostable circuit, from a 1977 Radio Shack documentation, uses a 7400. The time is given by the...
Integrated LM108 and LM101A are used in this fast adder with low input current, figure. The...
This ultra-simple tester and component gauge lets you perform continuity testing and even evaluate...