and an SPI controlled MCP2515 CAN controller which take care of the particulars of the CAN protocol. The big chip in the middle is a PIC 16F876, responsible for making sense out of the data.
Based on [Travis Goodspeed’s] GoodFET, the GoodThopter by [Q] uses the Microchip MCP2515 CAN to SPI controller to access the bus. The open hardware tool lets you send and receive messages using ...