This sound effect circuit is from a Radio Electronics magazine from December 1969. The transistors support equivalents and the power is provided by a battery to reduce the possibility of noise.
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...