This old indicator circuit indicates only when the fuel reaches the sensor level. The integrated circuit is not common today. The circuit was found in documentation from the 1980s.
This circuit was found in a Popular Electronics of the 1990s. Its purpose is to expand the scale of...
This circuit can be used as an input shield by removing the signal directly from the second port,...
In figures 1 and 2 we have two current drains that can be made with operational amplifiers and...