Nightblade
New Member
I have a breadboard which has one black knob with a ground symbol under it and three red knobs labeled V1, V2, and V3. It looks like this: http://www.globalspecialties.com/pr...owered-breadboard-premium/item/86-PB-104.html
I also have a bench DC power supply with one adjustable power supply with + and -, a 5 volt fixed power with + and -, and a 12 volt fixed power with + and -. (Three total power supplies each with a + and - ) It looks like this: http://www.extech.com/instruments/product.asp?catid=39&prodid=212
My confusion is why are there three negatives on the bench power supply but only one ground knob on the breadboard? What is the proper way to connect these up so that I can use all three different voltages on my breadboard at the same time?
I have tried a few different things myself and am getting some strange results when I measure with my multimeter between the pluses and minuses on different voltages. It seems that ground is not acting as ground except for the specific + it is paired with on the bench power supply.
I also have a bench DC power supply with one adjustable power supply with + and -, a 5 volt fixed power with + and -, and a 12 volt fixed power with + and -. (Three total power supplies each with a + and - ) It looks like this: http://www.extech.com/instruments/product.asp?catid=39&prodid=212
My confusion is why are there three negatives on the bench power supply but only one ground knob on the breadboard? What is the proper way to connect these up so that I can use all three different voltages on my breadboard at the same time?
I have tried a few different things myself and am getting some strange results when I measure with my multimeter between the pluses and minuses on different voltages. It seems that ground is not acting as ground except for the specific + it is paired with on the bench power supply.