In the figure we have a basic PLL circuit with the LM567 or equivalent. The circuit is from a 1977 documentation.
This circuit is an improvement over the previous one, using the same capacitor system as a sensor....
More and more supercapacitors are being used as supplementary sources of energy in several...
Found in a 90s Elektor, this mixer makes use of integrated circuits of the time. The supply must be...