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.
The A3906 integrated circuit from Allegro Microsystems (www.allegromicro.com) consists of a PWM...
This circuit was obtained in a manual for radio amateurs from 1975. It is a circuit that allows the...
This circuit was found in a 1986 documentation and it may be difficult to obtain some of its...