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.
We found this circuit in an English documentation from 1979. The circuit can be implemented with a...
This circuit was obtained in an English publication of 1977. The operational is of the type with...
With this timer we can start between 30 seconds and one and a half seconds, time set in the pot....