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2Can you monitor the Vin and +5V lines with a scope while the stepper is running? Electric motors can make power supplies noisy and unstable.Edgar Bonet– Edgar Bonet2020-11-23 10:00:23 +00:00Commented Nov 23, 2020 at 10:00
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1Your meter may also have a MIN mode that tracks the minimum voltage seen since started. It's not as good as a using a scope as Edgar suggests, but sometimes it can help.timemage– timemage2020-11-23 12:47:17 +00:00Commented Nov 23, 2020 at 12:47
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