This circuit visually indicates that a high voltage is present in an outlet or other point. The neon lamp is common, and the appearance of the assembly is suggested in the same figure.
This circuit was obtained in a 1991 publication. What it does is to amplify a signal with unit...
This capacitive approach alarm circuit was found in a 2002 documentation. The wire to the sensor...
This is a typical common emitter amplifier stage configuration. The transistor can be used...