Found in old American documentation, this circuit can use crystals between 27.5 and 33 MHz operating on the third harmonic. The transistor admits equivalent.
This circuit, which controls both the temperature and the level of a liquid in a reservoir, was...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...
This oscillator can be used to generate sinusoidal signals from less than 1 Hz to close to 20 kHz....