Found in documentation from the 1980s, this circuit can have several adaptations to use modern transistors and LEDs instead of the lamp. The power supply voltage can also be changed.
This elementary receiver with a crystal earphone was found in Japanese documentation from the...
The circuit shown in the figure uses the ST8R00 from ST Microelectronics which consists of a 1 A...
This circuit serves as a reference to learn how signals were decoded in the 1960s. The fully...