Apple Graphics Tablet STYLUS

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Apple Graphics Tablet STYLUS

Does anyone in AppleFritter land have any info, schematic, photos, etc. of the old Apple Graphics Tablet Interface Card  STYLUS?

I'm looking specifically for information pertaining to the Stylus itself.  I have the Tablet and interface card but am missing the Stylus for it.

I know it has a coil (inside the pen) and possible other circuitry, but I don't have any details for it.

I want to make up a pen that will work with the tablet.  Found a good readable schematic of the Tablet's interface board here:  Apple ][ Graphic Tablet Schematic

Based on the circuitry, there's an input to an Op-Amp that appears to be from a coil type arrangement, but there is also a transistor acting like some form of gated switch that is also triggered by something from within the Pen.

 

Does anyone have photos of the pen's internals they can share, possible a schematic, and (potentially) obtain an ohm reading of the internal coil?

If I can get this information, I think I can succesfully make a stylus.  Thank you all in advance.

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Apple Graphics Tablet View 1
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I wanted to buy that, but, it

I wanted to buy that, but, it went over the price that I was willing to pay for something that would spend most of its life in a box on a shelf, as I do not expect to be doing CAD on the ][+.

 

I would imagine that the pen itself is a small coil though.  

 

More here: http://quartdepomme.fr/quartdepomme/Hardware_Apple_for_Apple_II/Pages/A2M0029_Apple_II_Graphics_Tablet.html

 

I'm looking for the manual, as I would partly suspect the pen specs to be disclosed in it. 

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Very nice ...

Major eye candy Tom...  I did a little research on the pen, though I can't verify, but it appears the pen has metal pieces (shapes) in it with 3 wires attached to specific elements.

My initial thought was that it might have a coil... (I guess my thoughts on how they detect row & column was a bit skewed from how they actually do it)

Is there any info on the pen itself?  I found some patients but they don't show the inside very clearly.  Thanks for posting BTW.  Nice looking hardware you've got there.

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macnoyd wrote:Major eye candy
macnoyd wrote:

Major eye candy Tom...  I did a little research on the pen, though I can't verify, but it appears the pen has metal pieces (shapes) in it with 3 wires attached to specific elements.

My initial thought was that it might have a coil... (I guess my thoughts on how they detect row & column was a bit skewed from how they actually do it)

Is there any info on the pen itself? 

 

Graphics Tablet Operation and Reference Manual

 

Graphics Tablet Technical Procedures

 

The user manual has a schematic in Apx E, although the scan quality is not as good as it could be. It is on one page, at the end of the book.  The tech notes describe differences in the RFI and non-RFI version. 

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Here's a very clean Schematic...

Thanks for posting this info.   Still looking for information on the Pen by itself. 

 

Schematic below will print out on 11 x 17 Paper.  Likely the cleanest one you'll find.

Right-click to "View Image" for actual size view.

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I think I found one! (stylus)

After reading an article of history of 1979 Tablets here: https://tedium.co/2017/09/21/wacom-tablet-history/  I noted the mention of

the Summagraphics Bitpad.  The article states "the Apple Graphics Tablet was a rebranded Bitpad ", so I took a shot on eBay to see what

might be available, and out of sheer luck there were 3 available which include the Stylus!  Lucky for me, I now have a way to restore

this tablet to OEM condition.  For those interested, see item # 361263348487 .  Take note this is for the tablet & Pen only and does NOT

include an apple compatible card.  The Summagraphics Bitpad is actually a serial interface sevice.  The parts used and the case design in

this tablet are similar.

 

So, for all you folks with Apple Graphics tablets that need parts, here is a potential source for you to get what you need.

I must mention that I have not received this yet, so no guarantees.  More on thsi when I receive the actual device.

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macnoyd wrote:After reading
macnoyd wrote:

After reading an article of history of 1979 Tablets here: https://tedium.co/2017/09/21/wacom-tablet-history/  I noted the mention of

the Summagraphics Bitpad.  The article states "the Apple Graphics Tablet was a rebranded Bitpad ", so I took a shot on eBay to see what

might be available, and out of sh

 

Nice info. Now we need a clone of the interface and we can all have one. Heheh.

 

That aside, what do ou plan to do with the beastie?

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Like most of my Apple ][ items,

Like most of my Apple ][ items, I want to make sure it's all working with the documents and software.  Beyond that and after trying it out for a while, it will go into storage like all the other Apple ][ hardware I have.

It's not like I can do anything really meaningful with it. 

Kinda fits into the same category of the other Apple ][ items I have in the collection.

I am after all, an Apple ][ collector.  All will eventually be handed off or sold to the next collector. 

I just hope my kids don't view it as junk and toss it when I'm gone.  =:-O

 

If anyone in AppleFritter land is able to take a close-up photo of the Molex connector at the end of the Stylus that shows the wire colors, it would be greatly appreciated.

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Looking for Tablet software ...

Does anyone have the Utopia Graphics System  software they can share?  Supposed to work well with this Graphics Tablet.

Thank you in advance.

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Stylus follow up

Did the stylus from the Bitpad work for you? I recently purchased an Apple Graphics Tablet that came with the manual and original software. However, I'm missing both the stylus and the interface card. 

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mpconnick wrote:Did the
mpconnick wrote:

Did the stylus from the Bitpad work for you? I recently purchased an Apple Graphics Tablet that came with the manual and original software. However, I'm missing both the stylus and the interface card. 

 

The stylus will work, but without the interface card, it is a paperweight. 

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