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EEVblog => Other Blogs => Topic started by: scanlime on August 08, 2016, 07:06:16 pm

Title: Wacom Teardown and Schematic
Post by: scanlime on August 08, 2016, 07:06:16 pm
Hello again!

I've posted another electronics video about tablets, this one with an interesting application of 74xx logic in a relatively recent device.

https://www.youtube.com/watch?v=j4AKwJERxOw (https://www.youtube.com/watch?v=j4AKwJERxOw)

Here's a direct link to that git repo I mention:

https://github.com/scanlime/ec155 (https://github.com/scanlime/ec155)

Let me know what you think!
Title: Re: Wacom Teardown and Schematic
Post by: ataradov on August 09, 2016, 05:00:12 am
The tablet itself is next?
Title: Re: Wacom Teardown and Schematic
Post by: scanlime on August 09, 2016, 05:09:10 am
Quote from: ataradov on August 09, 2016, 05:00:12 am
The tablet itself is next?

Yep, or close to it! I think I'm slightly more curious about the pen, and I just got one from eBay that I'm prepared to tear apart. The circuits I glossed over in the tablet looked super interesting though, and I'd especially like to go into detail about the coil layout. It looks much denser than the huion tablet from earlier, but I think it's actually not very many coils but many turns per coil.

Thanks for watching!
Title: Re: Wacom Teardown and Schematic
Post by: nugglix on August 09, 2016, 05:12:47 am
Thanks for sharing!

Got sucked into it and want to play now...
... but have to do the other thing.

Really nice video to start the day!

Cheers
  Guido
Title: Re: Wacom Teardown and Schematic
Post by: T3sl4co1l on August 09, 2016, 06:02:09 am
Cool!

Wasn't aware -- nice to see more Jeri Ellsworths hacking around on stuff!

Tim
Title: Re: Wacom Teardown and Schematic
Post by: ataradov on August 09, 2016, 06:03:45 am
Quote from: T3sl4co1l on August 09, 2016, 06:02:09 am
Wasn't aware -- nice to see more Jeri Ellsworths hacking around on stuff!
Except it is not Jeri.
Title: Re: Wacom Teardown and Schematic
Post by: magetoo on August 30, 2016, 02:37:06 pm
I have to admit I clicked just to hear on which side you'd stand on the walk 'em / whack 'em pronunciation divide.  :-)

Nice job reverse engineering!  Makes me think what else one could do, using just coils and simple logic for NFC communications.


There's a tradition in a part of my town of having an "advent calendar" of sorts that is made up of windows in people's houses.  People have various kinds of displays, and every day until Christmas another one is revealed.

One of the participating houses had some sort of capacitive touch sensor made from aluminium foil on the inside of the glass last year, and you could use that to turn lighting on, and trigger some event in their display IIRC.  Now I'm thinking a coil and a few simple logic ICs is something you could give away to let people interact with art, or whatever weird project one might have.


Watching the (previous) USB and tablet video now, great stuff.  At the risk of seeming like a weirdo, I found the low-level legacy and dirty protocol hacks part really interesting.