The simplest programmable in-line keyboard with RGB, suitable for beginners [Pro Micro]

The round socket is welded on the motherboard, the welding hole is enlarged, and the round socket is attached to the motherboard. The PRO MICRO module component faces the motherboard. The module does not use pins, but directly solders the component feet as pins to minimize the height.

The module is a micro socket, and wires are used to connect the module to the type c socket of the motherboard; the reset uses a micro switch to open a small hole on the base plate to facilitate burning firmware.

The bottom row is equipped with RGB lights, and different colors correspond to different layers.

Copper fixed, copper base

Layer 0: letters + function keys, Fn1 enters the punctuation layer, Fn2 enters the number layer, Fn3 is the F ribbon, virtual mouse, and direction keys, and Fn4 is the software shortcut key and media key.

Press Fn1 and add space to switch to Chinese. When inputting Chinese, press space with your thumb to select the first word, Shift to select the second word, and enter uppercase letters with your left thumb and press Shift. All operations do not need to leave the main area.

Level 1: All punctuation marks are arranged according to personal habits and easy to remember, such as? It's the F position where Fa asks the question, # is at the J position of the pound sign... +-×/= is the same as the 2-layer numeric keyboard.

Layer 2: On the right is a complete numeric keypad. Double-clicking Fn2 can also lock Layer 2, which is convenient for inputting a large number of numbers. On the left are the direction keys, which are convenient for text editing. There is no need to move your hands when using them.

Level 3: Press your right thumb on Fn3, just like using a mouse gesture, which is convenient and comfortable.

Compared with conventional keyboards, the biggest advantage of inline keyboards is that the layout of the direction keys and numeric keypad is neat and easy to use. For playing games, you can also set up a dedicated layer.

Although the keyboard is small but fully functional, novices can also enjoy the fun of DIY.

The key setting is the soul of the entire keyboard. If you set it as needed, it will be very convenient to use. It will soon become my only main keyboard.

The above are the key settings of version V1.0. After constant use, it has been updated to version 2.0, which is more efficient and easier to use. Please see the attachment for details of the continuously updated version.

How to make a small layout keyboard easy to use?

Carefully designed small layout, all keys are within the comfortable operating range of ten fingers, and the little finger does not need to press the keys outward;

The most frequently used Enter key and Backspace key are under the little finger of your right hand and can be operated without moving;

The keys for switching layers 1 and 2, as well as the shift and space keys, are just under the two thumbs. The thumbs are no longer just used to press spaces, and the utilization of the ten fingers is effectively improved;
the left thumb presses the Fn1 key, and under the left hand is a complete numeric keypad and Arithmetic symbols, very suitable for left-hand numbers and right-hand mouse operations; [Update]
Press the Fn2 key with the right thumb, and under the right hand are the up, down, left, right, Home, End and other direction keys. The gestures are similar to holding a mouse, natural and comfortable, especially convenient when coding. Move the cursor position; [Update]
For all punctuation marks, you only need to press the Fn1 key or Fn2 key with your thumb, and press the corresponding key with the fingers of the other hand. All keys are in the finger comfort zone;
press the Fn3 key with the left thumb and press it with one hand F keys are simple and easy to use, Fn3 key on the right hand, virtual mouse... [Update]

Reference materials, thank you all for your contributions!
https://docs.qmk.fm/#/zh-cn/

http://www.keyboard-layout-editor.com/

https://kbfirmware.com/

http://builder.swillkb.com/

https://www.bilibili.com/read/cv10071032/

https://www.zfrontier.com/app/flow/2dq9AoE37KpE

https://post.smzdm.com/p/aekz8pdm/

https://www.zfrontier.com/app/flow/2wqGYOQPMpOQ

https://www.bilibili.com/read/cv5275203/

Any corrections or suggestions are welcome.