We found this transistorized circuit in a 1985 documentation. The circuit can operate with voltages from 9 to 12 V and the adjustment of the operating point or input sensitivity is done in P1.
Found in a 90s documentation, this switch that is also sensitive enough to operate capacitively uses...
This circuit was found in an integrated circuit manual from the 1980s. The circuit can be designed...
This powerful and sophisticated power supply was found in a 1998 publication. The circuit must...