Found in ancient documentation, this circuit uses a high voltage transistor of the time. Observe the supply voltage of the neon lamp used.
Found in a 1965 Electronic Design, this circuit produces a signal with the waveform shown in the...
Activating a relay from pulses (from a monostable, for example) can be useful in many types of...
This filter, found in an old manual, has characteristics of reduced overvoltage given by the graph...