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# My take on a splitted keyboard
to build :
docker run --rm -e keymap=default -e subproject=v1 -e keyboard=frenchdev --rm -v D:/Repositories/qmk:/qmk:rw edasque/qmk_firmware
The PHYSICAL rows and columns are connected as such :
on right hand (slave) :
I2C mcp23018
.------- --------.
GND -| 1 VSS \_/ NC 28 |
| 2 NC A7 27 |- C15
R5 -| 3 B0 A6 26 |- C14
R4 -| 4 B1 A5 25 |- C13
R3 -| 5 B2 A4 24 |- C12
R2 -| 6 B3 A3 23 |- C11
R1 -| 7 B4 A2 22 |- C10
R0 -| 8 B5 A1 21 |- C9
| 9 B6 A0 20 |- C8
| 10 B7 INTA 19 |
VCC -| 11 VDD INTB 18 |
SCL -| 12 SCL NC 17 |
SDA -| 13 SDA RST 16 |- VCC
| 14 NC ADDR 15 |- GND
`------------------'
and on left hand (main) :
TEENSY
.------------------.
| GND VCC |
C7 -| B0 F0 |- R5
C6 -| B1 F1 |- R4
C5 -| B2 F4 |- R3
C4 -| B3 F5 |- R2
LEDC -| B7 F6 |- R1
SCL -| D0 F7 |- R0
SDA -| D1 B6 |- LEDB
C3 -| D2 B5 |- LEDA
C2 -| D3 B4 |
C1 -| C6 D7 |
C0 -| C7 D6 |- GND
| D5 D4 |
| VCC RST |
| E6 GND |
`------------------'
we use pull up resistor for SCL et VDA, see https://github.com/ErgoDox-EZ/docs/blob/master/ErgoDox%20EZ%20Schematic.pdf for example
the connector is a standard TRRS (jack with audio + mic)
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