ItsyBitsy 32u4, 3V appears to have died inexplicably after minimal routine use

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andrewrgross
 
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ItsyBitsy 32u4, 3V appears to have died inexplicably after minimal routine use

Post by andrewrgross »

I purchased an ItsyBitsy 32u4, 3V 8MHz on order # 2978579-3743822299 last week.

I was trying to test two functions: one to read an encoder, and one that would control a mouse as an HID. I spent and afternoon with the board, and uploaded each of these sketches from Arduino IDE 2.0.3 without issue, then unplugged the board and set it on a shelf. The next day, when I tried to pick back up where I left off, the computer wouldn't recognize the board when plugged in on the same cable, and the board LED didn't illuminate. Another board worked fine when attached to the same usb cable. I can't think of anything I did that would've damaged the board. If I did something that damaged it, I'd like to know, but otherwise I think it seems like it might be a defective product.

Thanks for all help!
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dastels
 
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Re: ItsyBitsy 32u4, 3V appears to have died inexplicably after minimal routine use

Post by dastels »

Is there voltage on the USB (5v) and 3v (3.3v) pins when USB is connected?

Dave

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andrewrgross
 
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Re: ItsyBitsy 32u4, 3V appears to have died inexplicably after minimal routine use

Post by andrewrgross »

Yes. I can read 3.3 V on the 3 V pin and 5 V on the USB pin.

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dastels
 
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Re: ItsyBitsy 32u4, 3V appears to have died inexplicably after minimal routine use

Post by dastels »

OK, the power section is working. Have/post a close look at where the USB connector is connected to the board.

What code did you last put on the board? I.e. should the D13 LED be doing something?

Since the board was working fine before, it shouldn't suddenly fail while sitting on the shelf. It could be due to some mechanical failure. E.g. the USB connection breaking loose of the board. It could also be due to static shock from handling.

Dave

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andrewrgross
 
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Re: ItsyBitsy 32u4, 3V appears to have died inexplicably after minimal routine use

Post by andrewrgross »

I think I figured it out: it looks like because I'm trying to build a macropad, it's presenting itself as a keyboard to the Arduino IDE until I hit reset. Once I reset the board, I was able to reflash it with the blink sketch successfully.

Thanks for your help figuring this out!

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