In the figure we have a basic oscillator with inverters obtained from TTL, CMOS or other gates. The graph on the side allows to find the frequency depending on the resistor and the capacitor.
The presence of a low resistance between the terminals of the sensor causes this modulated...
This circuit was found in a 1970 IEEE publication. The circuit functions as a voltage controlled...
I found this circuit in a 1992 Electronics Experimenter Handbook. The circuit can be easily...