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Author Topic: Connecting Arduino ground to separate project ground  (Read 383 times)
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Hyperspace
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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)?
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Chile
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Yup! one common gnd for all things related if you want them to interact
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Hyperspace
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Thanks for the fast reply!
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Manchester (England England)
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Here is why you have to have a common ground:-
http://www.thebox.myzen.co.uk/Tutorial/Power_Supplies.html
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Hyperspace
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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.
« Last Edit: August 17, 2012, 12:17:26 am by compuslave » Logged

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