first impressions of the Lego smart brick, before I do any actual tearing down: wow, I forgot how good they are at working with plastic.
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I'm not yet sure how I'll open it up. I don't have a hacksaw (somehow... I should fix that), so my options are somewhat limited: it's either cracking or melting plastic. from what others have done I know I there's plastic welding all around the joined region.
@whitequark
No razor saw?
(a super fine modelling saw with a reinforced back) -
@whitequark
No razor saw?
(a super fine modelling saw with a reinforced back)@kirtai me: i don't have a hacksaw
you: no razor saw?
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@kirtai me: i don't have a hacksaw
you: no razor saw?
@whitequark
They're not the same kind of saw
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decided the next thing to do would be to dump the presumed Winbond flash WLCSP
here it is mounted on a SOIC-8 pinout with a tiny bit of UV epoxy, like a particularly exotic dead bug
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Interesting... I wouldn't do the port myself due to lack of time, but it should be doable.
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@whitequark Wow they've come a long way since the Mindstorms NXT bricks! I wrote my first embedded stuff on that brick, debugging my LCD driver by beeping out register values one bit at a time. Simpler, more innocent times when I didn't have the tools to hook into the handy JTAG port that was right there.
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@Viss bluetooth le, but yes
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decided the next thing to do would be to dump the presumed Winbond flash WLCSP
here it is mounted on a SOIC-8 pinout with a tiny bit of UV epoxy, like a particularly exotic dead bug
connected half of the pads
this is my first time soldering a 0.3mm pitch WLCSP, so it took me a bit to set up the workspace the way that makes it possible, but it's not too bad
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@migratory fascinating!
actually the easiest way to get rid of inconvenient abs is acetone. dump ABS in, get highly flammable toxic sludge out.
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@bob i don't have any nichrome at hand and i'm pretty sure i'd give myself burns if i tried
8-year-old me discovered copper works just fine when attached to a sufficiently large transformer.
much older me is banned from hot tools.
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@Viss bluetooth le, but yes
@whitequark hah, wow
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@whitequark Calling an ARC CPU industry standard is very funny to me
@ldcd @whitequark
It is quite widespread, even if not visible to end users.
Being in most Intel CPU's and all that. -
8-year-old me discovered copper works just fine when attached to a sufficiently large transformer.
much older me is banned from hot tools.
8 year olds should be allowed nowhere near these. https://dfarq.homeip.net/all-about-the-lionel-zw/
doubly so, two of them, with the knowledge you could run them back-to-back to do interesting things.
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@ldcd @whitequark
It is quite widespread, even if not visible to end users.
Being in most Intel CPU's and all that.@ftg @whitequark yeah that's why it's kind of funny, it is simultaneously a very common CPU and a very obscure CPU (ie it's hard to get comprehensive documentation, the devkit is literally an FPGA, etc)
Like they're not lying but they're trying to imply it's a normal CPU to use and be able to program which isn't really true
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connected half of the pads
this is my first time soldering a 0.3mm pitch WLCSP, so it took me a bit to set up the workspace the way that makes it possible, but it's not too bad
finally done. no shorts and (as far as i can tell under mag) no opens
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@ftg @whitequark yeah that's why it's kind of funny, it is simultaneously a very common CPU and a very obscure CPU (ie it's hard to get comprehensive documentation, the devkit is literally an FPGA, etc)
Like they're not lying but they're trying to imply it's a normal CPU to use and be able to program which isn't really true
@ldcd @ftg @whitequark I have yet to come across any SoC with an ARC core where the docs weren't partially or fully NDA'd, or at least gated behind a sales call.
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@ldcd @ftg @whitequark I have yet to come across any SoC with an ARC core where the docs weren't partially or fully NDA'd, or at least gated behind a sales call.
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finally done. no shorts and (as far as i can tell under mag) no opens
@whitequark xtra smol 🤏
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@gsuberland @ftg @whitequark This is my industry standard very normal CPU core (no you cannot look at)
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@ldcd @ftg @whitequark I have yet to come across any SoC with an ARC core where the docs weren't partially or fully NDA'd, or at least gated behind a sales call.
