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I am building a robot snake with a bunch of servos and ov7670. As I see, ov7670 operate with 3.3v and servos needs 5v. I will use Lipo battery for servos for this I need to connect ground pin of arduino and input of battery. But For ov7670, I already connect the ground pin of arduino. Can I connect ground with a jumper to another breadboard to connect with lipo battery and servos or I need two arduino nanos?

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You can use a common ground in fact it's the normal thing to do with external circuits such as relays, servos etc

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  • I am a beginner and do not know much about arduino. Thanks for your answer.
    – HollyPolly
    Jan 3 at 21:48

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