Make a wireless tenkeyless keyboard for controlling a media PC.
Acquire free Apple Extended Keyboard II.
Logitech K360: I got 2 for $26.
Scan in the pair of membranes into a 2-bit image, joining the traces at the pins connection.
Erode image to reveal pad locations for labelling.
Generate a preview to verify label positions before flood-filling traces to map out the matrix:
Less popular keys such as PrintScreen are accessed through a Fn layer, so F13/F14/F15 will be mapped to media keys.
Pin | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 |
01 | T | PGDN | P | 3 | I | C | CAPLK | 2 | ||||
02 | RBRC | DEL | PIPE | K | N | B | R | F10 | ||||
03 | INS | END | BKSPC | Z | F8 | Q | PGUP | L | TILDE | |||
16 | LSHFT | EQ | F11 | F6 | F3 | F | U | |||||
17 | RSHFT | COMMA | D | ESC | 0 | F7 | RIGHT | PLPAU | ||||
18 | LCTL | F1 | DOWN | S | 9 | F5 | ||||||
19 | RCTL | F2 | F12 | MINS | J | F9 | E | |||||
20 | LALT | 6 | ENTER | Y | G | 1 | VOLDN | |||||
21 | RALT | W | COLON | SLASH | O | UP | VOLUP | |||||
22 | LGUI | TAB | HOME | 4 | ||||||||
23 | H | V | 5 | Func | 7 | 8 | A | LEFT | ||||
24 | QUOTE | X | SPACE | F4 | DOT | M | LBRC |
Await a sunny day for making retr0bright to unyellow the AEKII ABS. It's mildly noteworthy how the same pattern of yellowing emerges on them.