#Just checking, are you saying this <

1 messages · Page 1 of 1 (latest)

analog yarrow
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Correct. This is on a Pi Zero WH, it doesn't seem to get contact.

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I have another that I'm using on a Pi 3 that works great. I bought both of them at the same time a couple years ago.
From some review it seems that either 1) there was a batch that had iffy manufacturing and might be off or 2) the type of pin going through it may make a difference.

vapid fiber
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could be different pin header dimensions, yes

analog yarrow
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I would have assumed the Pi Zero and Pi 3B+ use the same pin headers, but they may not. I have a spare Pi 3, I may test that.

vapid fiber
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I was going to pass a suggestion for 3.3v power pads and/or STEMMA/QT on the next rev on the bonnet (though that may be never)

analog yarrow
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That's a very useful suggestion in any event.

vapid fiber
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the pin layout is the same, more like some issue with pin tightness. Are the holes in the shim slightly offset so it fits tightly?

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which 2x20 header did you put on the Pi Zero (or did it come with one)?

analog yarrow
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I don't have it in front of me ATM, I'd have to check. It's the Pi Zero WH, so it's the headers that Raspberry Pi solders on.

vapid fiber
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i'll see if I have one. Thanks for all this info

analog yarrow
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Of course. I was also thinking of sandwiching in a Qwiic pHAT (5142).

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I'll check the board and the Pi 3 tonight.

vapid fiber
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I found my sample of shim and it seems tight (didn't check electrically) on the various Pi Zero's I have, but they all have headers I soldered myself. I also have a pHat but I think the header pins may end up being too short after using it. The Pi Zero WH looks like it has regular square pins in the photos, but I don't have one.

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in any case I will pass on the suggestion

analog yarrow
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So trying the Shim on the 0WH again. Power comes through fine, it's the SDA/SCL lines that are having an issue. If I press down on the port-end of the shim, I think it's lifting the board up just enough that it comes into contact with the data and clock lines and boards can be found.
If I put a hat on top of it (like the motor bonnet I plan to use) that levels it out and then while I have power, no devices appear.

vapid fiber
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or maybe just adding a little solder on the shim holes will make for a tighter fit

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could work with the qwiic hat and the motor bonnet, maybe

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some people have trouble

analog yarrow
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Part of me doesn't want to solder it on since I may some day reuse this for something else but honestly the chance of that is pretty low.

vapid fiber