LilyGo T‐CAN485 & CAN‐FD Motherboard - dalathegreat/Battery-Emulator GitHub Wiki

LilyGo T-CAN485 & CAN-FD Motherboard

This is work in progress BETA PCB design for a motherboard to hold both a lillygo T-CAN485, a CAN FD board and a smart highside power switch for contactors. Requires a small amount of SMD soldering. You will need to desolder the output connectors on the lillygo + can FD board.

  • Current version 1.1

Overview of features

  • Four channel smart high side power switch (short circuit, overload & thermal protection) 4th channel input&output is on terminal other 3 inputs are sourced from lillygo) 2.6A nominal per channel (6.5A current limit)
  • MCP2518FD CAN_FD module
  • Pluggable/swappable Lilygo and CAN-FD modules
  • Entire cost should be around 55USD
  • Requires both 12V (contactors) and 5V input

BOM

  • 1x PCB Link - Please make your own checks before manufacturing
  • 1x 83mm DIN Rail case with terminals AK-DR-105A Link
  • 1x SPI To CANFD MCP2518FD Module (must be this style) Link
  • 1x 6A round PCB fuse
  • 2x 2x6 2.54mm pin header sockets (Lilygo and Can data header)
  • 1x 1x2 2.54mm pin header socket (lilgo power header)
  • 9x 1 way 2.54mm pin header sockets (singles as they don't quite match the spacing, might be better options)
  • 4x 1206 4k7 SMD resistors
  • 2x [Optional] 1206 120ohm resistors (if you need to add termination on either can-bus) Both boards also have can jumpers
  • 1x Infineon BTS716G Link

Notes

  • Requires 20Mhz setting for CANFD (#define CANFD_ADDON_CRYSTAL_FREQUENCY_MHZ ACAN2517FDSettings::OSC_20MHz)
  • LillyGo is a tight fit in the case!

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