Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Major mistakes in PCB Designing

"Hi, im new to PCB design. I want to avoid any major mistakes. Can I ask you guys

a few questions?:)

1. What was your biggest 3 mistakes designing and why?

2. most popular software that you use and why

3. Biggest 3 frustrations about PCB design?

4. Biggest 3 fears (maybe related to PCB Assembly)?"

Your guidelines will be more helpful to proceed further.:D

Thanks

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    18 years ago

    1. A. Not planning for proper clearance around components.

    B. Getting footprints for connectors correct on the board (mirroe images, pin sequencing

    1-2

    3-4

    5-6

    7-8

    compared to

    1 5

    2 6

    3 7

    4 8

    compared to

    1 8

    2 7

    3 6

    4 5

    C. Not properly addressing clock traces and interference.

    2. no comment

    3. same

    4. A. Initial power up!

    B. Accidental shorting of power / Gnd while testing

    C. That little puff of blue / grey smoke.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    18 years ago

    It's easy to overlook the jtag or configuration circuits. While they do run fairly slowly, a clock is a clock. When you've got the JTAG TCK routed all over the place it's easy to run into reflection problems. And a double-clock is bad even at 10 MHz. So it's good to think about the design a bit, buffer if needed, or at least put down a series termination.

    Gregor

Recent Discussions