I'm looking for the same thing Sirs . Could you please help me to design a circuit for this ? I want to use a microcontroller and a small LCD display to show the voltage of some particular source . Another improvement, I want to improve the circuit to be connected to a high voltage/high current socket then when the socket is connected to a source and a load, then the lcd display shows the voltage and the current flowing through the socket that instance of time .
But for the microcontroller based circuit, i cant use another dc 5v supply as its not practical, I want to make a modification to let the circuit gets 5v from the power flowing through the socket that time . There should be a rectifying process to make the circuit run i think .
Please help me .
Thanks in advance .