m60 split

m60 5x12 split in lego¶

an ortholinear keyboard set in lego 5x12 split with optional encoders and leds

this is part of a bigger family of ortholinear keyboards in lego see for reference https://mlego.elena.space

status: tested all ok

Features:

5x12 split
1 encoder each side
led strip
5 pins
stm32f401 or 411 from we act https://github.com/WeActTC/MiniSTM32F4x1
firmware qmk

renders¶

left side

pcb¶

printed one

left side pcb

right side pcb

bom¶

2xSTM32F401 we act pins
60 signal diodes 1N4148 , do-35
2 encoders
3x4.7kΩ on left hand side R1 and R2 and on right hand side R1
2x100kΩ on left hand side R5 and on right hand side R4
4x220Ω - these are for leds so you may have to compute the R to match your colours and desired brightness. on left side that are R3 and R4 on right side R2 and R3
4 leds
2 40 pin DIL/DIP sockets whatever you prefer
2 JST XH 2.54 3P angle connectors, optionally another too for led strip
cable to work with the sockets, direct not crossed wires
led strip 3pins
5 pin MX switches 60
lego 16x16 plates for bottom, and bricks as you please

case¶

case information can be found here

assembly¶

this is a very rushed assembly guide but shall give you the main idea.

gerbers¶

gerbers ready to be printed at jlcpcb are available

full kicad project if you want to generate your own or modify is available here kicad symbols/footprints are in the m65 repo

firmware¶

rev1¶

stm32f401 or simply use this firmware be sure tiny uf2 has the uf2 bootloader. to install it use https://github.com/adafruit/tinyuf2

   git clone --recurse-submodules -b mlego https://github.com/qmk/qmk_firmware.git qmk-alin
   cd qmk-alin

   qmk compile -kb mlego/m60_split/rev1 -kb default
   make mlego/m60_split/rev1:default

rev2¶

stm32f411 or simply use this firmware be sure tiny uf2 has the uf2 bootloader. to install it use https://github.com/adafruit/tinyuf2

   git clone --recurse-submodules -b mlego https://github.com/qmk/qmk_firmware.git qmk-alin
   cd qmk-alin

   qmk compile -kb mlego/m60_split/rev2 -kb default
   make mlego/m60_split/rev2:default

pins¶

left:
columns: "B14", "A10", "A15", "B3", "B4", "B5"
rows: "B0", "A6", "A7", "B1", "A5"
right:
columns: "B0", "A3", "A2", "A1", "B7", "B5"
rows: "B1", "A4", "A5", "A6", "A7"

Encoders

Pad_A: A0
Pad_B: A8

Leds

Leds	Pin
NUM_LOCK	B12
CAPS_LOCK	C13
SCROLL_LOCK	B13
RBG_DI	B15

SPLIT_HAND_PIN B9 = SERIAL_USART_TX_PIN B6

other builds¶

these are Seth's builds (u/modularsynth123456/)