AllocsB
AllocsB
@allocsb
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Joined: 2024-03-20 9:50 am
Last seen: 2024-04-22 6:11 pm
Topics: 2 / Replies: 9
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RE: Advice on debugging: i2c drops when switching to external power

Hi all, I think there's some confusion about what I've tried and when so I hope this clears up some of that. This occurred to me but apparently...

2 months ago
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RE: Advice on debugging: i2c drops when switching to external power

@davee @zanderI enjoyed reading your discussion, I'm going to write down my takeaways and some more questions.I have the V3 board:It seems like the ca...

2 months ago
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RE: Advice on debugging: i2c drops when switching to external power

@zander Yes. The same as the Fritzing diagram I've posted. 3.3v external with connected ground over i2c.

2 months ago
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RE: Advice on debugging: i2c drops when switching to external power

It seems that connecting the grounds solved the issue! I will report back later today with some more information when I have some more time but just w...

2 months ago
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RE: Advice on debugging: i2c drops when switching to external power

Have some instant gratification, here I am reading a tag, just not with external power :)

2 months ago
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RE: Advice on debugging: i2c drops when switching to external power

That is what the i2cdetect commands from my first post are depicting. The 24 is the response of the pn532 when it's connected to the Pi's power. That ...

2 months ago
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RE: Advice on debugging: i2c drops when switching to external power

@davee Here's a basic Fritzing diagram. I've also taken a picture of my physical setup in my last post. Image:/p> Fritzing file:/p> I bought ...

2 months ago
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RE: Advice on debugging: i2c drops when switching to external power

Thanks for the responses everyone! @zander That makes sense. This supply has a 5V mode so I tried switching to that with the same result unfortunate...

2 months ago
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