Thanks and need more help on this
Hi Steve thanks for the reply ,
Yes its a highschool project which I should complete within next two weeks .
What I basically want is, to make a circuit which can sense the voltage and the current ( going through it that instance of time ) of a particular power cable ( like a twisted cable with live and neutral ) .
As an example, let say a INDUSTRIAL SOCKET with wire which is designed to send high currents and to work under high voltages ( 32A / 500V like range ) . So what I want is a device to measure the voltage and current of such a power cable . So you may think I can probably use a FLUKE multimeter, yes i can, but we are asked to make our own circuit to do this . Simply think we are installing this circuit to that industrial socket, so the socket has an indicator of voltage and current, and that should be digital .
Constraints are,
1. The circuit should have LCD ( 16x2 like lcd ) to show the voltage and current of the cable
2. The circuit should be based on a PIC micro controller . And for the PIC and the circuitary, the power must be obtained from the same power line we are measuring the voltage and current . ( as the circuit takes a very little current, i think that will not put a big impact of the load connected at the end of the power line, if I'm wrong please tell me )
3. The circuit should be able to measure votages from 0V to 600V ( atleast up to 500V ) AC voltage . And the current from 0A to 32A ( better if its possible to measure up to 60A or more ) .
4. When the cable is not connected to any source, the LCD display shows nothing and the circuit is in off state . But once when the cable is connected to a source and a load, that circuit gets power from it and indicates the voltage and current .
I have downloaded a PROTEUS files of a DIGITAL VOLTMETER from internet . But that can measure up to 30V maximum . So if its possible to increase this range up to 500V, please let me know the modifications .
See the attachment please .
This is the URL i downloaded the circuit from
http://www.electrosome.com/voltmeter-ammeter-pic/
Thanks in advance .
From da west .