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Shirogane Lab


Regular price ¥21,800 JPY
Regular price Sale price ¥21,800 JPY
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Kit Type

This self-made kit is designed to provide a shoulder-friendly 40% Separated keyboard with a 100% usable thumb trackball.


The Keyball Replacement Discount Set does not include the trackball case, optical sensor, etc. Please note that this set is intended for those who already own a Keyball series and wish to assemble a Keyball by converting the sensor and other components from the Keyball series. (If you are a first-time Keyball customer, please purchase the Standard set. (Please note that the optical sensor and ball case are not sold independently.)


This product is an assembly kit that requires soldering. For those who do not have a soldering iron or are not confident in their soldering skills, we offer an "assembly service".


Assembly instructions are explained in the following page.


The photo is a sample of the product and is not identical to the product contents.
Specifications and prices are subject to change without notice.

What is Keyball39?

A column staggered with each key shifted vertically is adopted so that each finger can be placed in the home position naturally, and a 34 mm trackball is attached near the thumb key so that the mouse can be operated without breaking the home position. am.

The motion sensor is placed on the back of the ball to make it as thin as possible, and even if the trackball is contained in the palm of your hand, it will not get in the way.

The trackball holding case is made by injection molding and is smooth to the touch. Since the system is good, hold the ball moderately, and even if you shake the keyboard upside down, the ball will not fall.

Since it is a reversible design, left-handed people can assemble by exchanging the left and right boards, and can also operate the trackball with the left hand. You can also use a dual-ball specification with trackballs on both the left and right sides (in that case, the trackball on the side where the USB cable is plugged in will operate the cursor, and the other side will scroll left, right, up and down). To make a dual ball, please purchase two one-handed sets with a trackball. On the other hand, if you do not want to mount a trackball on both hands, please purchase two one-handed sets without a trackball.

Although very compact with a total of 39 keys (left and right), key entry is stress-free thanks to the abundant thumb keys and the ability to assign a Modify key to the bottom key. Also, the key layout on the non-Travo side is similar to a numeric keypad.

In addition to underglow, LEDs can be mounted on the back of all keys except the thumb key (46 pcs total). LED is not included in the kit, so it is not included. If you need LED please parchase from here

The OLED module is installed on both the left and right sides as standard.

Compatible with Kailh PCB sockets, Cherry MX compatible switches can be used for hot swap. Only the thumb key can be changed to the Kailh Choc low profile switch, reducing the strain on the wrist.

Keyball39 Parts List

・ Middle PCB (left and right)… 1 set
・ Top PCB (left and right)… 1 set
・ Middle acrylic plate (left and right)… 1 set (including thumb)
・ Bottom acrylic plate (left and right)… 1 set
・ ProMicro protective plate (1 set on the left and right)… 1 set
・ 34mm track ball case (upper and lower)… 1 set (transfer discount Set ×)
・ Φ2 ceramic ball (spare)… 1 pc (Transfer discount set ×)
・ Trackball reading board… 1 sheet (Transfer discount set ×)
・ L-shaped conthrough pin (7 pins)… 1 pc
・ Trackball reading IC… 1 pc (Transfer discount set ×)
・ Lens for reading IC… 1 pc (Transfer discount set ×)
・ Flat head screw M1.7… 2 pcs
・ Small head screw M1.7… 2 pcs (Not a transfer discount set)
・ TRRS jack… 2 pcs
・ Tact switch… 2 pcs
・ Consul pin (12 pin)… 4 pcs
・ Diode (chip type)… 50 pcs +
・ OLED module… 2 pcs
・ Pin socket for OLED + pin header… 2 sets
・ Spacer M2 9mm… 4 pcs
・ Screw M2 3.5mm… 34 pcs +
・ Cushion rubber… 8 pcs
・ Various acrylic spacers
・ PCB socket for MX switch… 42 pcs +
・ Spacer M2 7mm… 13 pcs +

・ PCB socket for Choc switch… 5 pcs (used for thumb low pro)
・ Spacer M2 4mm… 5 pcs (used for thumb low pro)

Not included in the kit, but requires the following:
M ProMicro… 2 pcs

You can choose an inexpensive one or one that can use USB Type C. Four conslew pins are included in the kit, so please purchase only the microcomputer board.
・ Cherry MX compatible key switch… 39 (34 for thumb low pro specifications)
・ Choc compatible low profile key switch… 5 pcs (thumb low pro specification only)
・ 34mm trackball of your favorite color… 1 pc

Although not included in the kit, the following can be installed.
SK6812MINI-E … 46 pcs

In addition to this, a TRRS cable for left and right connection and a USB cable for connecting to a PC are required separately.
Checking the operation of the trackball Perixx PERIPRO-303 GR 34mm Replacement Trackball It was done in red, black, blue, green and gold.