Found in old documentation, this oscillator operates with high voltage. The diode must be of the appropriate type with low current and an inverse voltage of at least 100 V.
Found in documentation from the 1980s, this oscillator uses a general-purpose transistor and a...
We found this circuit in an American publication from 1977. The circuit drives two LEDs according to...
This HeNe laser power supply was found in the March 1989 issue of Radio Electronics magazine. This...