Main components

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Part NumberDescription
MAX3078ETransceiver 500Kbps SOIC-8 RS-485 / RS-422 ICs ROHS
STM32F030C8T6ARM-M0 48MHz LQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHS
MC34063AD3V~40V 1.5A SOIC-8 DC-DC Converters ROHS
DRV8837WSON-8-EP(2x2) Brushed DC Motor Drivers ROHS

feeder schematic

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feeder board layout

feeder PCB render

Top PCB
Bottom PCB