Digital pin failure

Posted on Thu 28th, January 2021

• #1

kri100s

I was playing for a while now trying to get a stepper motor working with the MDBT42Q module (breakout). It worked with default wave pattern (wave) but didnt with full step. Even the default seemed a bit weak so I finally hooked up oscilloscope to the board. It turned D5 pin was busted. I checked the bare module connection to the breakout and seemed a bit skewed but the continuity is there. I cut the track on my board and used D6 and it works fine now.
I guess I was unlucky.
Let me know if there is anything special about D5 I maybe missed. I just configured it to 'output'.
• #2

Gordon

Hi - sorry about that, I guess it was just a bad connection - but it's rare for it to happen.

I'm afraid there's nothing special about D5... I could arrange to get you a replacement?
• #3

kri100s

Ok, I was just wondering if I should use that pin for the new board version. I have to redesign anyway. It seems its just bad luck. I dont need a replacement. Its just that one pin. It works fine with D6 and I have still plenty to spare. Thanks @Gordon!
• #4

Gordon

Thanks! But no, there's no reason why you shouldn't use D5 - it should behave the same as any other pin

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