This circuit was found in a 90's EDN. The circuit has a well-known configuration. The voltage obtained depends on the number of diodes. Capacitors depend on the desired current.
Found in an old documentation about neon lamps, this circuit has the frequency basically...
This simple standing waveform (ROE or SWR) meter is used to adjust antenna matching with...
This is the traditional configuration of a high-pass filter with an operational amplifier, such as...