Using the 741 this circuit can be adjusted to values between 1 Hz and 100 kHz. The power supply must be symmetrical. We found it in the Radio Electronics magazine of November 1973.
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...