Skip to content

Design tips

Electronics design

Fusion Electronics (Eagle) library

How to use libraries:

  1. Download .lbr and upload it into Fusion's Team Hub

  2. Open Library manager > Hub libraries > Sync libraries > Add selected Hub libraries

  3. Place components

    • LDO (3.3V800mA NJM2845DL1-33): Symbol and footprint are equivalent to the one in LDO library
    • 2.1mm DC juck:
      • Fusion library: DC Power Jacks > 694106105102
    • SBR diode (SBR15U30SP5)
      • Footprint: POWERDI5

Custom library

For some parts, no public libraries are available, so a simple library can be created. In this case, those are only used for pad and through-hole placement.

Ref: Create your own electronics parts in Autodesk Fusion

  1. LM2596 module

    • This library is only used to place 4 through-holes (Planning to use leads (e.g., resistor) for soldering and place insulation spacers)
    • The module can be placed underneath the PCB, saving space and making soldering easier: Swap left and right on the PCB later

    • Pins: +IN, -IN, +OUT, -OUT
    • Modified based on the existing symbol

    • Footprint based on the LM2596 module dimensions
    • Set "Grid Size" each time to ensure accurate dimensions

  2. Mini blade fuse holder

    • This fuse holder is THT and has four through-hole slots.

    • Used the existing fuse symbol

    • PTH Pad was set as 0.8mm Long

  3. TVS diode (SMBJ45CA)

    • Bidirectional (no polarity): symmetrical symbol

    • Based on the dimensions

  4. SBR diode (SBR15U30SP5)

    • Modified based on TVS diode symbol as Schottky diode

    • The bottom left and right pins (anode) are connected

Double-sided PCB design

  • While routing, press Spacebar to place a Via that connect top and bottom layers
  • Then, the route automatically switch to the opposite layer and turn the color (red or blue)

Other notes

  • Breakout boards such as Pico and A4988 carriers are placed there only for pinout verification purposes and are not required for PCB design. Remove them afterwards to avoid unnecessary DRC violations due to THT pins such as routing between pin sockets.