Synchronized Triac Switch (CB26127E)

This zero-crossing circuit was found in the 1989 Radio Electronics Experimenter. The Triac must be controlled according to the load.

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5 W Amplifier without Muting TDA1905 (CB15220E)
This circuit is suggested by the 1982 SGS linear integrated circuit manual. The plate is given next...
Pulse delay (CB22282E)
This two-transistor delay circuit from the 1960s was found in documentation from the time....
Relay isolator (CB8033E)
This shield circuit is from an American documentation from 1969. The components can be modified...