With this simple circuit it is possible to simulate a telephone line for carrying out repairs on telephone sets. The transformer must be 36 V and the diode can also be 1N4004.
Although MOSFETs of the type indicated are not very easy to obtain, one can have the circuit as a...
This power source takes advantage of an old valve transformer that is no longer used and can...
Found in 90s Popular Electronics, this circuit fires a load through a MOSFET from an audio signal...