Master control

The wireless master adopts the Logitech G613 main controller, which has one of the most stable wireless modes in the industry - Lightspeed, which is power-saving and stable, and is responsible for providing Bluetooth and 2.4G capabilities.

The wired main control adopts APM32F103CBT6, which can replace STM32, and the personal purchase price is around 5 yuan, which is suitable for personal enthusiasts to develop and try. Wired and light power can be switched off completely, and the power consumption is not substantially different from that of the original G613 when no analog switch is added to implement the FN function.

Functional aspects

Adopt open-source QMK firmware.

The main control board integrates almost all components including the encoder circuit, and only the battery interface, switch interface, USB interface, diode, and RGB lamp can be added to the large board to achieve basic functions. The FN function in wireless mode can be realized by adding an analog switch (power consumption will increase).

Logitech GHUB software is available while retaining the G613's 6 G-keys, which can be customized.

RGB, solenoid valve, buzzer can be used in both wired and wireless modes, and can be turned on at the same time.

The OLED screen and encoder function (now available in wired mode) can be developed in-house, welcome to communicate.

Arrangement replacement

The main control board is separated from the design, which leads to all the matrices of G613, which can be edited and constructed by yourself to build keyboards of various sizes, and the lighting matrix can be modified.

The G613 main controller can choose not to solder, and at this time it is a wired QMK keyboard, and other functions are retained except for wireless mode. Convenient for individual trade-offs.

HUB

There is a five-button RGB HUB circuit in the project for physical verification, and the firmware of the keyboard can be modified according to the QMK source code. Self-access is available.

Firmware flashing

Please decompress the firmware source code, transfer it to the official QMK sample folder for firmware compilation, and flash the BL and firmware to use.

Precautions

1. Please limit the maximum RGB brightness in the firmware, otherwise, when there is no battery power, only use the computer USB power supply, the light will seize the main control power supply, making the keyboard unresponsive. There is no such problem when using the battery.

2. The maximum current of battery discharge is 2.4A, when the RGB reaches the maximum brightness, the use of the solenoid valve may cause the solenoid valve current to be too small to be used, please reduce the RGB brightness or use USB and battery power supply at the same time.When plugging in USB for battery charging, turn off wired mode, and it may not charge properly.

3. The pad at the fixing screw of the M2 small board is left by the SMT chip stud, please modify the size according to the size you purchased.