Fast adder 1 (CB7055E)

We found this circuit in an Electronic Engineering from the 90s. It applies to any logical family.

Touch Switch or Water Alarm 4001 (CB16319E)
The presence of a low resistance between the terminals of the sensor causes this modulated...
Multilayer Varistors for Surge Protection - TDK
TDK provides a wide range of EPCOS varistors for surge protection through Mouser Electronics....
Signal injector (CB21649E)
This circuit was taken from a Popular Electronics from January 1967. Transistors are from the...