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Driver display section will be a standalone unit. 1 input connector is feasible. This will also be separate than the removable cosmetic section of the dashboard. 4 displays, Power for Pi Zero, Pi Zero, and CAN.
Off the shelf CAN transceiver on the driver display Pi (This one uses an MCP2515: https://copperhilltech.com/pican-2-can-bus-interface-for-raspberry-pi/). Also see the instructions here (https://www.beyondlogic.org/adding-can-controller-area-network-to-the-raspberry-pi/) We can make this a hardware task.
https://libre.solar/devices/rpi-can-gw/
https://mx5things.blog/2017/04/28/raspberry-pi-zero-w-for-car-applications/
https://copperhilltech.com/blog/lowcost-doityourself-can-bus-to-wifi-bluetooth-ble-usb-rs485-gateway-based-on-raspberry-pi-zero/
We can make this section 1 unit, with 1 MX150L going to this.
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Fans will be mounted to the dash. Wires routed along a cable track on the dash to a single connector on the Front Electronics Enclosure. Need to make sure that the fan connector is easy to access when removing the panel.
I knew I forgot something! - fan control - we will assume these potentiometers will be located in the Center console section. We’ll only use 2 wires to reduce harness count, and have a pullup resistor on-board.
8 - Horn (the sound-making device). Will be mounted on the front near the right side (we use the horn while passing), so it will be a little louder. 2 pin MX150L to the front electronics. Permanently connected pigtail to the horn.
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