Triac simple contactor (CB9273E)

This circuit for controlling AC loads in the power grid was found in a 1967 Electronics World. The load determines which triac should be used.

VHF and UHF switch with diodes (CB9227E)
This simple circuit for switching RF signals was found in an RF Design from the 90s. The circuit...
Variable Flasher LM3909 (CB25425E)
This configuration was found in the January 1992 Radio Electronics magazine. The frequency is set...
Electric fence (CB6933E)
This circuit was obtained from a 1965 Radio Electronics. The semiconductors used admit modern...