Symmetrical Inverter (CB6647E)

This circuit reverses the signal if both positive and negative. We found it in an American documentation from 1969.

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Monostable with LED Indicator (CB13595E)
This monostable circuit, from a 1977 Radio Shack documentation, uses a 7400. The time is given by the...
Fast Summing Amplifier (CB15892E)
Integrated LM108 and LM101A are used in this fast adder with low input current, figure. The...
Component Tester and Meter (CB4465E)
This ultra-simple tester and component gauge lets you perform continuity testing and even evaluate...