This circuit is from a factory manual from the 80s. The circuit can be implemented with modern operationals. The supply must be symmetrical, and the diode is general-purpose.
This circuit was found in a Popular Electronics from the 80s. With it we can make a 100 W...
This alarm triggers a relay when the sensors are activated. Consumption is very low in the waiting...
This general purpose circuit was found in a Popular Electronics. It is intended for detecting the...