This basic CMOS 4001 circuit was found in the April 1976 issue of Radio Electronics magazine. The circuit generates rectangular signals, and the components can be changed to obtain other frequencies.
This simple super-regenerative receiver was found in American documentation from the 1980s. The...
We have already explored this configuration in several projects on our website. What the circuit does...
This circuit with only one transistor was found in Japanese documentation from the 1960s. The...