The Arduino Uno boards are powered by the standard 5.5mm DC power jack that come on the board, using a 5V DC adapter (so that is Vin?).
The MCP2515 modules are powered by 5V pins from the Uno.
The Arduino Uno boards are powered by the standard 5.5mm DC power jack that come on the board, using a 5V DC adapter (so that is Vin?).
The MCP2515 modules are powered by 5V pins from the Uno.