Next step is removing the ADM202 TTL-to-RS232 chip, where things took a disastrous turn: my overeager Dremel application removed the chip as well as the pads it sat on, and gouged out some of the PCB to boot.
TABLETMAGIC CRACKED
Great! Ordered a Teensy and cracked open the tablet to set to work.įirst, I knocked off the serial connector and voltage regulator (soldered across that instead), as the USB will provide the +5V needed to drive the tablet. The solution comes from the WaxBee project, which uses a Teensy 2.0 to sniff old-protocol tablet packets and re-encode them to emulate an Intuos2 (a modern USB tablet with driver support). New problem – I have no machines with a serial port any more, and even if I did, Wacom drivers don’t support serial tablets any more. Holding the pen over the tablet causes the LED to switch from orange to green, which was good enough for me to figure it’s working.
The new Samsung Galaxy Note S tablet uses Wacom styluses and the replacements are cheap – $8 on eBay, so I ordered one. I did more research and found that Wacom pens are actually somewhat interchangeable – in this case I can use any “Penabled” pen on it, and it’ll probably work.
Recently I had an interest in getting this working again. A few eBay searches revealed that pens were crazy expensive to replace at the time. Wacom pens have built-in smarts to communicate with the tablet and relay pressure information, pen/eraser mode, button click, etc. These devices aren’t like an iPad or whatever (which use a capacitative touchscreen) where you can use your finger or a cheap stylus. It came with serial cable and power brick, but no pen. Six or so years ago, I picked up a Wacom ArtPad II digitizer from Freecycle.
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