Commit Graph

23 Commits

Author SHA1 Message Date
Dave
89bfdd71a9 Move LED current limit resistors to keyboard PCB
For better matching of current limit resistors to LEDs, the resistors are moved
to the keyboard matrix PCB, where they can be tuned for maximum brightness (at
100% duty cycle).  This allows consistent keyboard brightness when a single
interface PCB is swapped between keyboard matrices.
2020-04-05 20:00:20 -05:00
David Fenyes
869f7c2260 Deleted obsolete files 2020-03-21 12:10:49 -05:00
David Fenyes
0bd2fa0330 Move DIP switch to row 8 (9th row) 2020-02-28 21:02:30 -06:00
David Fenyes
eb28b7b59f update screen shot to 2.4 2020-02-28 03:38:46 -06:00
David Fenyes
9550331adf PCB cleanups
- swap numbering of row select protection diodes for cleaner PCB labeling
- clarify labeling on GPIO pins on the MCU
- bump rev to 2.4 to indicate work in progress. Release will be 2.5.
2020-02-28 03:31:48 -06:00
David Fenyes
92816e64e8 Update README for ASCII interface 2020-02-28 03:24:48 -06:00
David Fenyes
c30deb3442 OUT3 is /RESET on Apple1 and Apple2 connectors.
OUT3 is RESET on both Apple 1 and Apple 2 connectors
Fix comment on the OUT1, OUT2, and OUT3 functions.
2020-02-16 12:55:53 -06:00
David Fenyes
821ef250ca Add SOL-20 connector 2020-01-28 15:04:01 -06:00
David Fenyes
a03a207a09 Keyboard layout updates
- Add extra key to the left side of row 4 to permit "inverted T" for those who
  want it.

- Tiny shifts of several keys to correct key distances

- Include mounting holes with daughter board connector, to ensure consistency.
2020-01-20 07:22:13 -06:00
David Fenyes
420cafc371 Merge branch 'master' of https://github.com/osiweb/unified_retro_keyboard 2020-01-03 11:02:08 -06:00
David Fenyes
72e4f3d362 Move DIP switch to row 15
So keyboards with more than 8 rows can have keys on contiguous row numbers.
2020-01-03 11:01:11 -06:00
dfnr2
9102f87635 Update README.md 2020-01-03 08:41:48 -06:00
dfnr2
07247c0202 Update README.md 2020-01-02 22:20:41 -06:00
David Fenyes
d6d1b60ff9 Merge branch 'master' of https://github.com/osiweb/unified_retro_keyboard 2020-01-02 22:16:08 -06:00
David Fenyes
2cdabd6d4c updated rendering 2020-01-02 22:15:48 -06:00
David Fenyes
dff3830307 ASCII interface update
- Fix wrong direction DIP switch diodes
- Add buffers to permit ISP lines to also be used as output and LED drivers
- Allow 3 keyboard LEDs and 3 host outputs (RESET, CLEAR, BREAK, LOCAL, etc.).
- Outputs 1 and 3 are general purpose (can be open drain or driven).  Output 2
  is open collector (with optional on-board pullup).
2020-01-02 22:13:36 -06:00
dfnr2
865940518b Update README.md 2020-01-02 21:43:20 -06:00
David Fenyes
4621770c31 README.md update to add assembly image 2020-01-02 21:38:20 -06:00
dfnr2
399813c0c7 Create README.md 2020-01-02 21:31:40 -06:00
Dave
594e3d7d8b Finalize layout and mounting
- Add apple 2 mounting slots (and stretch PCB to accommodate slots
- Add pass-through holes in aligners for OSI keyboard spacers
- Move 'ESC' key next to '1' key
- Add TAB key next to Q key
- remove 'here is' and finalize "helper" keys along left side of keyboard
- move legends off of PCB traces
- update to release 1.3
2020-01-02 10:08:11 -06:00
Dave
8aeab966d4 Keyboard interface cleanups for ASCII controller
Fixed lines for POWER LED and button, SHIFT Lock, Rubout, and CAPS LED.
2019-12-27 13:03:46 -06:00
Dave
a58dcc4234 OSI mounting holes
- Add OSI-compatible mounting holes.
- Adjust keyboard and aligner holes to make room for the OSI mounting holes
- Change "Universal Keyboard" to "Unified Keyboard" in the design files.
2019-12-14 03:52:15 -06:00
Dave
784805adc7 first commit 2019-12-12 14:46:29 -06:00