With this circuit, signals in the range of 10 kHz to 150 kHz can be received at close to 4 MHz from a shortwave receiver. The circuit is from a 303 Circuits from the 90s.
This circuit generates a tone of a bell and can be used in this type of application. The circuit is...
This circuit uses a common-cathode 7-segment display powered from a decoder and a 0-9 counter. The...
With this simple converter found in a 1997 documentation, it is possible to tune VHF stations to a...