View Full Version : [Question(s)] Two negatives, One positive?

12-20-2011, 10:59 PM
Hello, the major hardware builds on my robot are done, but there are somethings I'm not quite certain about; in particularly, the powering and grounding of my motor circuits.

Basically, the motors themselves have a power source only they use, ( 4 C batteries.) the rest of the components on the bot are powered by a single 9 volt battery.

Now, the instructions say to ground everything to pin 23 of the BS2, which is connected to the negative pole, including the motor circuits.

So, the motor circuits are connected to the power and ground on the 4 C batteries, and to the ground on the 9 volt battery.

My question is if I should connect the motor circuits to the power of the 9 volt battery as well.

12-21-2011, 11:34 AM
It's a good idea to always have all of the grounds connected together. It doesn't hurt anything, and can stop other problems from surfacing.

Keep the positive feeds separated.


12-21-2011, 12:01 PM
ok, thank you.