This touch switch uses components that have easy-to-obtain current equivalents. The power supply must be isolated and the cable to the sensor must be short.
This circuit was obtained from a Poptronics in June 2001. The magazine no longer exists, but the...
We find this circuit in a 1980s documentation. The circuit uses uncommon components today which can...
This circuit has a very high input impedance and a very low output impedance. We found it on a...