Major mistakes in PCB Designing

Altera_Forum · ‎07-19-2007

"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

Altera_Forum · ‎07-24-2007

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 · ‎07-27-2007

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

Altera_Forum · ‎07-27-2007

Yes, not giving enough attention to JTAG and config is a common problem. Check out this thread that has some pointers on JTAG...

http://www.alteraforum.com/forum/showthread.php?t=687

Altera_Forum · ‎08-05-2007

Thanks for you support everyone..!! :D

Regards,

S