This circuit was obtained from an Electronics World of 1969. General-purpose transistors can be used in this configuration.
In the figure we present an interesting application suggested by Microchip (www.microchip.com) in which the voltage...
This circuit was found in an English technical documentation from 1973. The circuit generates...
We found this circuit in a 1974 documentation. The NPN transistor can be the BD135 and the PNP the...