Jug

A 6x3 column staggered split keyboard with a large thumb cluster.

The jug is a 6x3 column staggered split keyboard with 46 keys. It has a 5 key thumb cluster extending out to reduce reaching back with your thumb. It uses USB C for interconnect and includes two indicator leds per side for caps/num lock and layer (eg. Colemak vs QWERTY).

The PCB supports both hotswap sockets and directly soldering the switches. It is fully reversible and uses soldered jumpers for the MCU, a RP2040 Zero.

All components are placed so that the case sides are exact mirrors.

Parts

Electronics

Part	Count	Price ($)	Link
RP2040 Zero	2	~4 each
MX Switches	46	~20-30
Hotswap Sockets (optional)	46	~10 for 70 on AliExpress
1n4148 Diodes	46	~2 for 100 on AliExpress
USB C Ports	2	0.40 (5 min order on lcsc)	https://lcsc.com/product-detail/image/GT-USB-7010ASV_C2988369.html
1206 SMD LEDs (I used red and blue leds)	4	0.42 (100 min order on lcsc)	blue or red
1206 35.7 ohm SMD Resistors	4	0.18	https://lcsc.com/product-detail/image/RC1206FR-0735R7L_C488810.html
1206 5.1k ohm SMD Resistors	2	0.22	https://lcsc.com/product-detail/image/FRC1206J512-TS_C2907509.html

Other

Part	Count
1u Keycaps	42
1.5u Keycaps	4
8mm m2 Standoffs	14
m2 x 4mm Screws	28
m2 x 12mm Screws	4
m3 x 12mm Screws	12
m3 Heat Set Inserts (5mm OD, 4mm L)	12

I used socket head screws with hex drives. For the m2 screws screwed into the standoffs on the top (from the plate side, there are 14 of these) you will need to have screws that have a low enough head so that they don't hit the keycaps. I used these.

If you don't want to buy keycaps you can also print some like the ScottoCaps.

Case

The case can be printed in its provided orientation, with the bottom to the build plate. The screw holes have sacrificial bridges in them to allow it to print cleanly. After printing, use a knife to cut through them. Other than that there should be no cleanup necessary.

Firmware

I made both plain QMK and a Vial version of the firmware. They both have Colemak for the base layer with QWERTY as a second layer. You can set QWERTY as the base layer by moving the = 0 to _QWERTY from _COLEMAK in the keymap.c file, changing this:

enum layer_number {
    _COLEMAK = 0,
    _QWERTY,
    _LOWER,
    _RAISE,
    _ADJUST
};

to this:

enum layer_number {
    _COLEMAK,
    _QWERTY = 0,
    _LOWER,
    _RAISE,
    _ADJUST
};