The main feature of this circuit found in an old American publication is that it is powered by the very signal it converts. The transistors are of the time and can be replaced by current types.
The basic frequency of this circuit is determined by the capacitor of 470 nF and the adjustment of the...
The main feature of this circuit found in an old American publication is that it is powered by the very...
This interesting circuit was found on the Internet and is based on the 555. The circuit uses power...