Hi to all.I have to build a project about a digital voltmeter and amper meter and send data to pc.I will have 3 volt input from -12v to 12v and 4 amper meter from -1A to 1A.From a quick research i did i decided to use the 16f877 pic.For the ampers i will use a current sensor.My questions are.How can i measure negative voltage? and what i need for rs232 communication with pc(max232)?
p.s.I will use vb2008
thanks
p.s.I will use vb2008
thanks