Found in a Popular Electronics from the 90's, this circuit can generate frequencies according to the values of the employed components, according to the table next to the diagram.
This interesting circuit found in a European publication from the 1990s eliminates the voice that...
This simple circuit that interrupts the supply of a 12 V load in the event of an overvoltage was found in...
The radio presented was found in a 1980 documentation. It consists of 3 stages: the tuning circuit...