This oscillator can generate 2 to 10 MHz signals and was found in an American 1980s documentation. The circuit is stable and its supply voltage is 5 V.
With this circuit, a well known configuration, small speakers and even low-impedance headphones...
This simple circuit, which requires a low current (50mA) relay for 5 to 12V power supplies, was...
Found in a 1975 radio amateur publication, this simple oscillator is for code practice. The PNP...