4 Channel RailCom and Block Occupancy Detector

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Main components

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Part NumberDescription
74HC595BQ,1158-bit SIPO shift register,3-state, QFN16
AVR-64DA481.8V~5.5V 10bit 12bit 24MHz 41 64KB AVR VQFN-48(6x6) Microcontrollers (MCU/MPU/SOC) ROHS
MPM3610AGQVSwitching Voltage Regulators 21V/1.2A DC/DC Mini-Module Regulator with Integrated Inductor
MIC5235-3.3-40℃~+125℃@(Tj) 1 150mA 18uA 24V 3.3V 310mV@(150mA) Fixed Over Current Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO)
THVD1450DRBRRS-422/RS-485 Interface IC A 595-THVD1450DRBT
INA181-A1-200mV~26V -40℃~+125℃ 1 20V/V 350kHz SOT-23-6 Current Sense Amplifiers ROHS
INA381A2
INA181-A4-200mV~26V -40℃~+125℃ 1 150kHz 200V/V SOT-23-6 Current Sense Amplifiers ROHS

C13 schematic

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C13 board layout

C13 PCB render

Top PCB
Bottom PCB