This oscillator with emitter follower was found in an American documentation from the 80's. The circuit generates 100 MHz signals and the transistors admit modern equivalents.
This circuit is from a 1967 publication. The Triac can be any of the TIC series. The series...
This circuit was obtained in old documentation, but it is valid for modern triacs that must be...
This circuit charges a battery to power a flashlight at night. The circuit is from an English...