This circuit found in a 1964 US publication reverses the signal level by providing 9 to 0 V outputs from 0 to 9 V signals. Transistors may be equivalent.
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...