juanmcasillas/Sun2UsbAdapter
Adapter for using Sun Keyboards (4/5/6) as USB devices, with macro support
Sun2UsbAdapter
Adapter for using Sun Keyboards (4/5/6) as USB devices, with macro support, using the excellent Alexander Vollschwitz's suniversal adapter. This repo includes the specific pinout for the OEM 8pin connector, and how to wire it to the arduino pro micro (clone).
NOTE This code supports the mouse without added electronics, using the altsoftserial library with reversed serial logic. Please see config.h and check
SUN_SOFTWARE_MOUSE variable to activate software mouse (check the arduino pro micro pinout) and SUN_TO_WIN if you want to use the alternate keyboard map supporting mapped
windows keys (alt, diamond, compose, etc.) Uses the AltSoftSerial library to manage the serial port using custom ports. Check the documentation (specific pins are hardcoded in the library based on arduino's model)
Parts
Cheap Ebay 8Pin MiniDin, model N8Pin (3,60€ / 5 units).
Ardunio Micro Clone Any model will work.
Connector Pinout and wiring
After reverse engineer the wiring, I get the following
table:
| Connector PIN | Base PIN | Wiring color | Description | Arduino PIN |
|---|---|---|---|---|
| 1 | E | Red | VCC +5V | VCC |
| 2 | F | White/Black | To Mouse | Optional D5 (TX) |
| 3 | H | Green | From Keyboard | D10 (RX) |
| 4 | A | White | To Keyboard | D9 (TX) |
| 5 | G | Black | From Mouse | D4 (RX) |
| 6 | D | Yellow | VCC +5V | |
| 7 | B | Yellow/Black | GND | GND |
| 8 | C | Grey | GND |
Thanks to use the AltSofserial, if you use an arduino pro micro, you can wire the mouse pins and works without additional electronics to invert the signal.
Software Install
See the guide on Alexander Vollschwitz's suniversal adapter. Just download the sketch, select your board (arduino micro or leonardo) and download it. Just edit the
config.h file and select your options (mine where don't use mouse, and don't debug). NOTE (31/05/2024) I manage to map the keys to the right Windows key usage, except the
volume mute, volume up and volume. down. To fix that, I map MUTE to F13, DOWN to F14 and UP to F15, and with the powertoys Microsoft PowerToys I start the keyboard manager, and add remaps for the F13, F14 and F15 keys to the system commands).
. NOTE (31/05/2024) I manage to map the keys to the right Windows key usage, except the
volume mute, volume up and volume. down. To fix that, I map MUTE to F13, DOWN to F14 and UP to F15, and with the powertoys Microsoft PowerToys I start the keyboard manager, and add remaps for the F13, F14 and F15 keys to the system commands).