This dual balanced modulator configuration was obtained in a 1980s telecommunications documentation. The circuit makes use of transformers and the diodes are commonly used.
This General Electric circuit was found in a 1964 documentation. The circuit triggers a relay when...
This indicator for audio signals uses only 3 components. LEDs are common and the audio signal with...
This circuit was obtained from a 1985 Electronic Desing. The circuit uses a Darlington which may be...