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 high voltage switched generator circuit was found in a 70s American documentation. The...
With this 1-transistor circuit we have a high input impedance and good gain. The circuit is from a...
This wireless intercom has a range of about 300 meters using an integrated circuit that is not...