This circuit is from the 80's integrated circuit manual itself. The component is not as common today as the MOS transistor used. The circuit can be adapted for modern applications.
In the figure we have the simple way to obtain a digital inverter using a general-purpose...
This circuit works with only 1.5 V and can be powered by a solar panel. The circuit is from 1991....
This circuit was found in a 1969 EEE. The circuit uses transistors from the era that can be...