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Topic: Ground in schematics to which ground the battery or arduino ? (Read 593 times) previous topic - next topic

bsjd

I have a read a topic on L298 H bridge and i was given this schematic... The schematic has 4 grounds which grounds do I connect to arduino (5v) and which to the other power supply for the motors (12v battery)

CrossRoads

All grounds need to be connected.
Preferably all to the same point, the battery - , but that is not always practical.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

bsjd

Thanks for replying in a short time :), So I can connect all the grounds to the same ground (arduino 5v or bateery 12v) ? Is that true ? Thanks in advance :)

CrossRoads

Yes. Connect all grounds. Ground is used as the reference point for all signals.
Battery -
Arduino Ground
Any signal grounds
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

codlink

I thought that you couldn't (without some more components) connect a v5 ground and a different voltage ground...  Am I wrong on this?
//LiNK

CrossRoads

All grounds need to be connected unless the portions of the system are electrically isolated. I don't see that here.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

codlink

//LiNK

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