This trigger-delay circuit was found in a 1960s General Electric unijunction transistor manual. The circuit applies to the 2N2646.
This circuit was found in an American documentation and can be added to common amplifiers of any...
This circuit reinforces signals in a frequency range between 1500 and 2000 Hz for use in...
This simple circuit indicates, through an LED, when the water level of a filter (or other kind of...