This circuit can be used as an amplifier for musical instruments or even with your cell phone. The circuit is old and was found in the 1990 edition of Radio Electronics Experimenter magazine.
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...