This power supply with only 4 components has basic full-wave configuration. The diodes depend on the current and the transformer voltage determines the output voltage.
This circuit allows the division of the frequency generated by an oscillator with the 4069 by two,...
Found in ancient documentation, this circuit uses a high voltage transistor of the time. Observe...
This circuit with TTL compatible output was found in a 1968 US documentation. The circuit is...