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TOPIC: UNO compatibility issue? Shield pins dont line up

UNO compatibility issue? Shield pins dont line up 6 months 3 weeks ago #581

  • holdend
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I assembled my shield and before powering it on I noticed what appears to be a compatibility issue with my UNO. The header sizes are different. I have attached photos of both of the sides of the uno/shield differences in pins, as well as a shot of my UNO and its headers. Are there any changes I can make with the hardware/software to make it work?
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UNO compatibility issue? Shield pins dont line up 6 months 3 weeks ago #582

  • Ray
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You have one of the "old" Arduino UNO rev1 or 2, this models have this2 pins left.

connector-comparison-r2-r3.jpg


Newer rev3 models have these 2 extra I2C pins.
Anyway, these pins are not used and you do not need to apply any changes in the hardware or software :)
Last Edit: 6 months 3 weeks ago by Ray.
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