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.
This regulator type series for charging batteries from solar panels was found in a technical...
We can use high value electrolytic capacitors in alternating current circuits with the...
We found this circuit in an old French documentation from the 70s, but it can be assembled using...