This oscillator produces a modulated signal using a unijunction transistor. We found it in an American documentation from 1965. The circuit modulates in frequency the generated signal.
You can program the 4018 in other ways, as shown in the figure. In this 7 divider configuration, for...
This circuit amplifies signals from low impedance sources as microphones, transducers, etc. For...
This continuous wave transmitter (CW) can send signals in the 30 to 100 MHz band, depending on the...