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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Thyristor Command 555 (CB17242E)
In the figure we show how to use a 555 to control an SCR or another type of thyristor. Resistors R1, R2...
Broadband Amplifier (CB21856E)
This circuit was taken from the 1974 Ferranti transistor manual. Transistors are common types at...
Transistorized Push-Pull Intercom (CB11210E)
This interesting intercom circuit was obtained from an Argentine publication from the 1970s....