Teensy CAN Gateway Design

flux

2:23

Planning PCB Component Placement.

Clarifying Component Functions.

Refining Component Placement.

Determining Power Placement.

Accessing knowledge base.

Reading docs about How to manually place and move PCB components in Flux, rotate, flip, and lock footprints; centering connectors on board edges; adjusting board outline visibility and using the Objects panel in PCB editor..

Reading docs about How to place and move components in the PCB editor in Flux, including selecting footprints, dragging, snapping/alignment guides, and locking footprints in place..

Organizing Component Placement.

Got it—let’s place the power block in the top‑left. Here’s how to move/rotate parts in Flux:
“This is what the Flux documentation says about positioning: ‘To move a component, left-click on it and drag it to the desired position. For rotating a part, there are two options:
  • Right-click on the part you want to rotate and select "Rotate right" or "Rotate left."
  • To rotate parts quickly, use the open or close square brackets [ ]’ Note: moving or rotating a component creates an Object-Specific Layout Rule you can edit.” Source
What to place in the top-left power zone (in this order from the CAN1 connector inward)
  • At connector power/ground: place J1 (reference), then put F1 in series on Pin‑9 (+12 V) as the first element, with D2 (TVS) very close to the connector’s power/ground for a short, direct return.
  • After the fuse: place D1 (reverse‑polarity protection) on the 12 V path feeding the buck input.
  • Buck cluster: place U3 compactly with its input/output capacitors C1, C3, C4, C5 tight to the appropriate pins per the datasheet; keep the high‑di/dt loop as small as possible.
  • LDO zone: place U4 a bit inboard, with its decoupling C2 right at VOUT/GND, feeding your 3.3 V loads.
  • Keep this entire power area separated from CAN pairs and their return paths; do not route the switcher’s SW/return under the CAN sections.
If you want, I can review placement once you’ve dragged these parts into the top‑left zone.
Clarify exact power block extent
Ask about rotation/orientation
CAN vs power separation
Thermal/ground strategy
Add another connector constraint
161 days
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    CAN Gateway V2

    CAN Gateway V2 thumbnail
    Teensy 4.0 Dual CAN-FD Gateway with Switchable Bus Termination

    Properties

    Reverse Polarity, TVS, Fuse

    No remaining violations

    75.326

    mm

    Teensy 4.0

    715.4

    mm

    Hole5 is visible in the PCB layout and meets M5 NPTH design specifications

    -59.338

    mm

    154.75mm x 94.78mm

    -955.1

    mm

    10.00mm, 10.00mm from board origin

    154.75

    94.78

    12

    V

    Teensy 4.0 Dual CAN-FD Gateway with: 12V DC input, reverse-polarity protection, TVS, fuse, buck to 5V, 3.3V LDO supply, two CAN-FD transceivers with DB9 connectors, and status LEDs.

    CAN-FD

    Automotive

    true

    No remaining violations

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