This circuit was obtained in a 1980s publication, but it can be easily assembled today, as all components are common. The transformer is 12 + 12 V with at least 1 A and the diodes 1N4002.
Found in Electronics now, this circuit generates signals given by the formulas next to the...
This source was found in the National Semiconductor's Linear Applications Handbook of 1994....
This circuit is another practical idea for places where they still receive signals from analog TV. The...