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Checklist for testing out new electronics

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I'm not experienced with these matters "yet." But i have a new from China Arduino Mega, Ramps 1.4 and a set of a4988s. So I don't blow anything out can someone give me some rudamentary steps to testing things out?

For instance, what to do to make sure the Mega is working properly before I even attach anything or upload firmware (MARLIN)?

Then if that is working and I install the firmware, Is ther a way to test the RAMPS 1.4 without the A4988.

How do I test the A4988? I've read about blowing them out. How can I safely test them eith my motors?

Also what is the process of adjusting the a4988 with that little pot? Do i really need a ceramic screwdriver? What size, I'll order it on ebay.

Just need a starting point to make sure all electronics are operational.

Best Wishes

Maxi

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