This circuit generates short pulses. The transistor can be a 2N2222 or BC548 and the frequency is given by the resistors and the capacitor that can be changed.
The clock circuit shown in the figure is suggested by Murata and is based on a ceramic resonator of the...
This circuit is from an American publication from 1974. It, at the same time, limits the intensity of...
This oscillator was found in the January 1987 issue of Radio Electronics magazine. The frequency is...