Hi, sorry I am a little bit noob.
I don't know if this topic belongs here.
I have a project at school to make a voltmeter and ammeter combined.
I can do only 1 at a time and my professor said that I need to use a switch and I found a 2P6T rotary switch
how can I combine these 2?
sorry for my noob question, any answer will do great help. 
below are the circuit of the voltmeter and ammeter i found in the internet.
Open your digital VOM meter and see how many poles of their switch are used.
Paul
Another question to consider: how do you measure amps when all you have is a voltmeter?
Another question to consider: how do you measure amps when all you have is a voltmeter?
That’s not so hard - measure voltage drop across a known series resistance...
BUT what does OP want the switch to do?
Connecting the switch is easy, switch wiper to ground (0V), and 6-positions to inout pins with INPUT_PULLUP flag set. (there are other ways, but thats the easiest)
Then test those six inputs to determine which one is ‘low’...
In a 6T switch, only one will be low at a time - ignoring make-before-break possibilities.
