This circuit is from 1999 documentation. However, it can still be easily assembled, as all components used are common. The sensors can have their quantity increased, being connected in parallel.
Found in an American brochure from the 90s, this circuit shows how we can implement a 4-input AND...
The integrated circuits in this application are not very common today. One consists of an A / D...
September 2016 - It can be obtained from Mouser Electronics the FAN602 integrated circuit...