This circuit was found in a Hands On Electronics with the suggested application an optical link for wireless TV headset or remote sound. The circuit is battery powered.
This circuit indicates the polarity of a voltage applied to the input. The circuit can make use of...
Yes, tunnel diodes can also be used in voltage regulators, as shown in this circuit from a Radio...
This rather sophisticated circuit does not recognize false tones, such as harmonics, and can be...