This circuit was obtained from American documentation from 1966. It triggers when the two input voltages are within a pre-established range. The circuit can be mounted with modern transistors.
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...