Hi, I don't intent to "resurrect" this old thread. Just want to "report" another success and add some info which I think can be useful for Mac users who don't want to open their tablets in order to modify it.
I have used TabletMagic for many years. It worked well. But currently (PSCS4, AiCS4 + OS X 10.8/10.9/10.10/10.11), I'm not getting pen pressure support from it. Although TabletMagic supports pen pressure in Adobe CC under various versions of OS X, I don't have enough budget to "rent" the CC. So I've to make my tablet compatible with Waxbee to use Wacom's driver.
I read how a member named "Sicarius" made an adapter and like the idea.http://forum.bongofish.co.uk/index.php?topic=1993.msg17274#msg17274
So I follow his guide with three exceptions:
- My MAX3232 runs dangerously hot at 5v, so the Teensy needs to be converted to use 3.3v.https://www.pjrc.com/teensy/3volt.html
- I still use the tablet's original power adapter. So I don't need the LM2577 DCDC module.
- My connector is male Mini-DIN 8 (Mac serial port). So I have to find a female one. I've found that all the reasonably priced Mini-DIN 8 connectors on eBay have the position wrong for the holes in the middle row. They are equally spaced which is wrong. It would damage the pin-4 if forced to fit. Fortunately the correct ones are available on aliexpress at cheap price and some seller is selling 1 piece per lot.
With all the parts ready (Teensy 2.0 with MCP1825 regulator, MAX3232, and a female Mini-DIN 8 ), it is very easy.
(the Teensy has two sets of VCC/GND, use the one that is the most convenient for you)
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PS. With the reduced voltage, the Teensy should run at 8MHz instead of its full speed of 16MHz. Fortunately Waxbee contains an option to select in the File > Raw Config Editing > CPU core clock.
The counterfeit Teensy boards from China don't work (it could only do the simple blink trick to fool you), you have to buy a genuine one from http://pjrc.com
or their official distributors.