This circuit allows you to read resistors up to 20 M ohms, converting it into voltage. The circuit is from the 90s. The operational ones used admit modern equivalents.
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...