Main components

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Part NumberDescription
OKI-78SR-12_1.0-W36-C1.0A Step-Down DC/DC-Regulator, 15-36V input, 12V fixed Output Voltage, LM78xx replacement, -40°C to +85°C, OKI-78SR_Vertical

trss3 schematic

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trss3 board layout

trss3 PCB render

Top PCB
Bottom PCB