This circuit was found in an Electronic Design from the 90s. The shapes of the signals obtained as result of the inputs are shown next to the diagram.
This circuit was found in the September 1974 issue of Radio Electronics magazine. The circuit uses...
This circuit was found in the December 1983 issue of Radio Electronics magazine. The sensor is an...
We found this circuit in a 1975 publication. The circuit can be made with more modern equivalent...