the button will be like a speedmeter an show me the value of resistance...i must give values for the I(Ampere) and V(voltage) and shows me the value of resistance which is based with the type r=V/I and then will give me the graph of V/I...Basic,i don't know how to do that i mean how to give the equation=V/I...i need help if somebody can make a such simply programm and send me...Thanks!!!!
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