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+# Frenchdev : My take on a splitted keyboard for dev and french language
+Concept based on
+ - [ergodox](https://ergodox-ez.com/)
+ - [katy](https://deskthority.net/workshop-f7/katy-keyboard-or-k80cs-key80-contoured-split-t8524.html)
+
+with the added possibility to connect up to 6 external switches like pedals,
+ and somewhat like the katy, not all keys are on the same level for easier reach.
+
+###Photos
+- [default layout](http://i.imgur.com/r2Nvr4p.png)
+- [editable layout on keyboard layout editor](http://www.keyboard-layout-editor.com/#/gists/4480e3ab8026eb7c710a7e22203ef4aa) (keys placement is NOT precise on this)
+- [the thing when finished](http://imgur.com/a/6FY8v)
+- [concept and cardboard mockup](http://imgur.com/a/R0vvs)
+
+##Build instructions
+
+ docker run --rm -e keymap=default -e keyboard=frenchdev --rm -v D:/Repositories/qmk:/qmk:rw edasque/qmk_firmware
+
+##Laser-cuttable file
+There is intentionnaly no hole for the TRRS connector, you are supposed to use a drill for it.
+This way if you don't want to use the pedals you don't have a useless hole. Plus it's cleaner.
+http://qmk.fm/frenchdev/frenchdev_v1_lasercut_template.svg
+
+##Side stickers
+You can find my original file here : http://qmk.fm/frenchdev/example_printable_stickers.svg
+
+I used it when training but now I use blanks and the layout is different.
+I still uploaded it because I think it can be a good jumpstart for any temporary stickers on the
+side of keycaps.
+
+##List of parts
+- I2C mcp23018
+- [teensy 2](https://www.pjrc.com/store/teensy.html)
+- 3 LED, 5mm tall with flat head
+- 3 330 ohm resistor
+- 2 470 ohm resistor
+- 2 TRRS connectors
+- 1 [micro usb breakout board](http://www.ebay.com/itm/-/201387922085?)
+- 88 cherry/gateron switchs
+- 94 4148 diodes
+- 34 R4 keys
+- 14 R3 keys
+- 20 R2 keys
+- 22 R1 keys
+
+if you fancy adding pedals :
+[these are good enough and cheap](https://www.amazon.fr/gp/product/B00V7WITKI/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1). You also need a RCA connector for each of those to replace the included cable
+
+If you (or your coworkers) find them too loud you can replace the switch inside them.
+For once we don't really care about what's inside :)
+
+##Various indications
+
+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 and 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)
+
+Diode direction is row to column
+