This circuit without sensors in series triggering an SCR was found in volume 5 of the 1995 Encyclopedia of Electronic Circuits. The circuit can have the number of sensors changed.
This circuit was found in a 90s Electronic Engineering. The quadruple operational amplifier can be...
This circuit for link or alarm was found in the Encyclopedia of Electronic Circuits Volume 5 of...
The integrated circuit used in this application is uncommon today and specific to the application, as it...