CXT_9-key customized small keyboard_2 knobs

1. Introduction

Try it out.

The original intention was to adjust the computer volume and switch songs, as well as the occasional macro/shortcut keys. After its release, the response was good, and the solution is simple, so it is open source and cannot be used for commercial purposes.

2. Keyboard introduction

Based on Pro Micro main control, the structure is base plate + PCB + positioning board, QMK open source firmware, and supports VIA.

Micro USB interface, 9 hot-swappable axes, double knobs

Note: Five-pin axes are not supported. If you need a five-pin axle, please change it yourself.

1. Support VIA instant key change, support rich key values, key value list reference: https://docs.qmk.fm/#/keycodes

2. Support VIA instant knob change.

3.Support Layers indicator light.

4. Compatible with hot-swappable shaft seats.

5. Contains 9 WS2812 RGB axis lights.

6. Think about it later.

3. Materials

1. Separate purchasing list

[Switching diodes and capacitors can be purchased separately or at Lichuang. The BOM below is empty, so they are listed separately]

2. Lichuang Procurement List

4. Welding instructions

It’s not difficult to make, but you have to be careful and don’t be careless.

1. The WS2812 lamp bead pad has a circle silk-printed pin for GND. The second row is opposite to the first and third rows. Observe carefully to avoid welding errors. Lamp bead welding is easy to damage and requires many spare parts.

2. Pro Micro must confirm the position of the first pin and identify the front and back sides. Otherwise, once welded, it will be difficult to remove and correct.

3. The EC11 knob must be purchased from Uxin Electronics . The height is 15mm or 20mm. Otherwise, the positioning plate holes will not match up. Do not solder the two GND pins when welding, otherwise it will be difficult to remove and replace them later.

4. Think about it later.

5. Instructions for use

The structure is a sandwich structure of base plate + PCB + positioning plate, so the PCB, base plate, positioning plate, and three Gerbers are required to be sampled to form a complete keyboard.

You can also design the casing by yourself, with only the PCB and positioning board being prototyped.

For specific installation, please refer to the pictures below.

1. Before assembly, follow the tutorial to flash the firmware of Pro Micro. The firmware is in the attachment. Tutorial: http://help.cxt-studio.com/#/Flash

2. After assembly is completed, download VIA-C for trigger test and light test. Download address: http://help.cxt-studio.com/#/start

6. Picture display

1. Final product

2. Carefully observe the direction of Pro Micro

3.Side view

4. PCB back view

7. VIA interface