This traditional signal injector configuration was obtained in a 1977 amateur radio manual. The frequency is given by the capacitors and the supply can be made with 1.5 or 3 V.
In the figure we have the way to connect several 555 to obtain sequential operation. The component...
This circuit was found in an 80's General Electric documentation. The circuit uses uncommon...
This modulator can be used in a data link or other signals up to 200 kHz. Range can be achieced...