This seems like an interesting and affordable project. I wonder if I should get one and put it together with the Teensy controller. How many people have done it so far?
Quite a few I believe. In case some folks haven't seen it on other threads:
It's fairly simple with a DB9 connector and Hasu's TMK converter.
This is some wiring info from TMK documentation:
-----------------------------------------------------------------------------------------------------------------------
Keyboard Plug from front:
DSUB-9
-------------
\ N 2 3 4 5 /
\ N N N N /
---------
2 GND
3 VCC 5V
4 DATA
5 CLOCK
N No connection/No pin.
Connection
In case of using ATMega32U4/U2 (EDIT: The Teensy 2.0 uses the ATMega32U4)
1. Supply power with VCC and GND.
2. Connect CLOCK to PD1 and DATA to PD0. You can change pin with config.h.
3. Optionally you may need pull-up resistor. 1KOhm probably work.
-----------------------------------------------------------------------------------------------------------------------
TMK converter and keyboard editor links:
https://github.com/tmk/tmk_keyboard/tree/master/converter/ibm4704_usb/binaryhttp://www.tmk-kbd.com/tmk_keyboard/editor/unimap/?ibm4704_usb_alpsThe DB9 connector I used:
https://www.amazon.com/gp/product/B00WW6P636/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1