# 4x4x4 glow bit cube

**URL:** <https://forum.core-electronics.com.au/t/4x4x4-glow-bit-cube/14037>\
**Category:** Projects\
**Created:** [10 May 2022 02:32 UTC](https://forum.core-electronics.com.au/t/4x4x4-glow-bit-cube/14037 "2022-05-10T02:32:55Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**Author:** ![Liam](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/liam/32/3562_2.png) [@Liam](https://forum.core-electronics.com.au/u/Liam)\
**Post date:** [30 May 2022 03:15 UTC](https://forum.core-electronics.com.au/t/4x4x4-glow-bit-cube/14037/16 "2022-05-30T03:15:36Z")

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Hi Doug,

> [@Doug27394](#):
>
> I get “device descriptor request failed”

I wasn’t able to find any comprehensive reasons as to why this may be happening, to confirm your suspicions I’d say that something on the Xiao has let out the magic smoke.

To further Trent’s response about headers something with a low profile would also benifit, check out these listings:

- Swiss headers ([Male](https://core-electronics.com.au/36-pin-swiss-male-plug-headers-pack-of-5.html) - [Female](https://core-electronics.com.au/36-pin-swiss-female-socket-headers-pack-of-5.html))
- Short headers ([Male](https://core-electronics.com.au/36-pin-0-1-short-break-away-male-header-pack-of-10.html) - [Female](https://core-electronics.com.au/36-pin-0-1-short-female-header-pack-of-5.html))

With the PGA you might be able to pop the headers in and only connect the USB breakout when you have to program the module, then detach it once programmed!

Regardless of how you connect everything I’d try to insulate parts that shouldn’t short, electrical/[Kapton tape](https://core-electronics.com.au/high-temperature-polyimide-tape-1cm-wide-x-33-meter-roll.html)

PS: Here’s a forum post @Liam120347, a community member made a little while back where he hacked up a Pico to make it a smidge smaller (at around 35mm I’m not certain that it would fit inside the cube but might be worth a shot!)

> [@Getting started with hacking your electronics](https://forum.core-electronics.com.au/t/getting-started-with-hacking-your-electronics/12799/1):
>
> # Fitting Pico’s where they probably shouldnt be
> 
> While stumbling around the net wasting time [I came across this article about how you could cut down a Pico](https://hackaday.com/2021/04/02/slimming-the-raspberry-pi-pico-the-quick-and-dirty-way/) since the bottom porttion didnt have any sensitive components or traces that fed any signals back towards the main processor.  
> Check out the Tweet that inspired that post: [https://twitter.com/PaintYourDragon/status/1376643550536892419?s=20](https://twitter.com/PaintYourDragon/status/1376643550536892419?s=20)  
> **Warning, you might cut yourself or ruin some Picos if you try this!**  
> I got a Stanley knife and made some deep cuts on the PCB on both sides and snaped the bottom part off a couple.  
> ![image](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/b/baeeca7d8a7993dc41d534ec8b820f9642333a05.jpeg)
> 
> Now they can fit in much smaller spaces (still the same full size IO, which can be a disadvantage. For $6 this isnt too bad. If you want to spend a bit more but have a PiicoDev/Qwiic/STEMMA port check out some of the [QT Py boards Adafruit make](https://core-electronics.com.au/search/?q=qt+py)

Liam

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