A DIY functional equivalent of a Wacom Cintiq (on the cheap), using an old laptop LCD and an ancient Wacom serial tablet.
The tablet controller has been successfully converted for USB function and the firmware works. The LCD and controller are fully functional. Unfortunately, I can't get the tablet to respond to input on top of the LCD. I may just continue to use the tablet without a screen, and set up the LCD as a standalone monitor.
At this point, all the parts used are hopelessly outdated and not particularly useful, so I'm shelving this effort.
- Arduino Pro Micro (ebay knockoff version)
- Wacom UD-1212-R tablet
- Laptop LCD
- Laptop LCD backlight inverter
- Laptop LCD controller
miscellaneous notes to self
Program via (must reset device and act quickly):
avrdude -p atmega32u4 -c avr109 -v -P /dev/ttyACM0 -U flash:w:"whatever.hex"
Had to strip waxbee down to get it to fit into the available space (stripped ADB stuff and whatever else looked useless).
Reset via grounding the RST pin.
The LCD controller advises at least 12V/3A, using an ATX PSU seems to fix most of the stability issues. Configure via:
xrandr --newmode "1400x1050_60.00" 121.75 1400 1488 1632 1864 1050 1053 1057 1089 -hsync +vsync xrandr --addmode VGA1 1400x1050_60.00 xrandr --output VGA1 --mode 1400x1050_60.00
The LCD controller seller suggested higher resolutions may need passive or active cooling; adding a heatsink seems to have helped, and a fan seems to have improved it further. Tweaking the cooling setup may fix all remaining stability issues.
The LCD is of terrible quality relative to modern equivalents, and has pathetic useful viewing angles.