This transistorized circuit is powered by a voltage of 6 to 12 V providing high voltage for a neon lamp. The circuit is from a 90's publication. Modern equivalent transistors can be used.
Twin-T oscillator are designed to produce sine low frequency signals. These oscillator are...
Found in na 1970 EDN this circuit has a parallel regulation providing a symmetrical output of 15 V....
This circuit was found in an Electronic Design. It makes use of a relaxation oscillator to trigger...