Apple-2-HW/unified_retro_keyboard
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284 Commits 9 Branches 8 Tags 62 MiB
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Commit Graph

18 Commits

Author SHA1 Message Date
Dave
7608d822b5 Adjust some holes so interface mount holes double as aligner mounts. 2020-06-25 23:13:41 -05:00
Dave
14248df6fe mechanical fit and buildability fixes 
- Moved header slightly forward

- Moved interface mount holes do reduce interference with case mount holes

- For all keys in classic keyboard, add option for either through-hole or SMT
diodes and resistors.
 2020-06-23 17:21:38 -05:00
Dave
ac19a16902 Add OSI interface PCB to repo 2020-06-16 13:14:51 -05:00
Dave
e415d43c84 Update addon board updates 
- Add diode to C5 to prevent discharge into 5V

- allow selection of default ON or OFF soft switch.
 2020-05-27 19:23:34 -05:00
Dave
42989dbd41 Update readme for clarity 2020-05-27 13:12:54 -05:00
Dave
4e40e324b6 Add image to README 2020-05-27 13:11:30 -05:00
Dave
35a39dda72 Add README.md to OSI interface 2020-05-27 13:10:28 -05:00
Dave
59f7eb9896 Completed routing on OSI interface board 
Cleaned up and fixed schematics
 2020-05-27 12:22:58 -05:00
Dave
b5fa4f43bb Fix comment in addon.sch 2020-05-21 16:00:06 -05:00
Dave
3c8a02ce9a addon board uses 74HC14 2020-05-21 15:13:04 -05:00
Dave
1d2ccf8727 Update PCB to latest schematic 2020-05-21 13:51:19 -05:00
Dave
9482a3bf0e Adjustments for OSI RESET and shiftlock circuits 
- adjust RC constants to use simple, common values and reduce number of
different part values.

- Create add-on PCB to provide reset/shiftlock function for older 542 and SB2
keyboards.
 2020-05-21 13:48:38 -05:00
Dave
32e74986c5 More special keys and other circuit cleanup. 2020-04-27 17:16:08 -05:00
Dave
01f57f69e1 Circuit tweaks 
- Add power-on reset to reset circuit
- Modify Shiftlock circuit to require only one jumper
 2020-04-23 11:27:54 -05:00
Dave
0e70d49f44 Remove unused files 2020-04-21 14:37:25 -05:00
Dave
fe238606ff Delete unused filenames 2020-04-21 14:36:44 -05:00
Dave
5fa0f80b4e Add OSI interface schematic 
Provides a keyboard interface to interface with OSI computers.  Equivalent to an
OSI 542C.

- Includes sound circuits

- Includes RESET delay circuit

- SHIFT LOCK can be mechanical push-on/push-off or soft toggle, selectable by
jumper.

- Provide SHIFT LOCK LED output.
 2020-04-21 14:30:59 -05:00
Dave
784805adc7 first commit 2019-12-12 14:46:29 -06:00