In the figure we have an IF amplifier step using a MOSFET. The circuit was found in a 1980s documentation, intended for FM receivers of the time.
This circuit can be controlled by an external signal which allows its use as a shield. The circuit...
This simple SCR alarm circuit was found in an old Poptronics, but can be easily assembled as all...
This circuit was obtained from a 1966 magazine but can be easily assembled using the 2N2646 as a...