This circuit was found in Linear Technology documentation from the 90's. The circuit uses components from that time, and can be powered by 5 V. In these conditions, it can function as a shield.
This circuit was obtained in a 1979 101 Electronics Projects. The circuit can be assembled easily,...
Figure bellow shows how one of the two separated counters found inside the 4518 is used as a...
The circuit is from the Linear Application Handbook. The resistors determine the voltage applied to...