Quantity   Component name
1 × ATmega4809 AVR Microcontroller with 48k flash, 6k RAM
2 × Switching VReg Module https://www.aliexpress.com/item/10pcs-Mini360-DC-DC-Buck-Converter-Step-Down-Module-4-75V-23V-to-1V-17V-17x11x3/32726423486.html
1 × CH340E USB/Serial Module https://www.aliexpress.com/item/1PCS-CH340E-USB-to-TTL-Serial-Converter-5V-3-3V-Universal-Not-need-switching-Model-BTE17/32821571106.html