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Topic: Connecting Arduino ground to separate project ground (Read 666 times) previous topic - next topic

compuslave

I'm using a motor shield and it uses a separate power supply(12V) from the arduino's 5V. Am I suppose to tie the arduino's ground to the same ground used by my motors(the 12V supply)?

eried

Yup! one common gnd for all things related if you want them to interact
My website: http://ried.cl


Grumpy_Mike


compuslave

#4
Aug 17, 2012, 06:40 am Last Edit: Aug 17, 2012, 07:17 am by compuslave Reason: 1
Nice, thanks for the link!

Edit: That was a good read, and something I knew I needed to get in the habit of doing. But using the motor shield I wasn't sure if I needed to since the shield handles all that, or so it seems. I have an ext_power block on the shield that I hook 12V to and it gets it to the motors. Maybe not having that ground connected had something to do with my H-bridge burning up the other day.

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