nrfmicro_E73

The nrf52840/nrf52833 core board, which is made using the Yibaite E73 module as the core, is mainly used to verify the ZMK firmware.
The core board integrates power supply and charge and discharge management. It automatically switches to USB power supply when plugged in and automatically switches to battery power supply when unplugged (the battery switch needs to be turned on).
If you need proofing, directly use the PCB file "print" to output the gerber file to place an order. For a 4-layer board, pay attention to the silk screen marking the proofing parameters at the bottom of the pcb file.
The project contains two parts, one is the core board and the other is the FPC expansion board.
The attachment contains four:
1. The bootloader file of pca10056 nrf52840
2. The bootloader file of pca10100 nrf52833
3. The skew68 zmk firmware file used for testing
4. The io port and keymap allocated by gpio skew68 for the rows and columns