Eagle PCB check

What do you guys think

Am 13.06.2013 08:49, schrieb anshul sanam:

What do you guys think

 

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Link doesn't work!

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Mit freundlichen Grüßen / With best regards

Joern Paschedag

here it is both the schematic and board file

http://www.mediafire.com/view/czx9fo052bcbncd/anshuluino1.schhttp://www.mediafire.com/download/czx9fo052bcbncd/anshuluino1.sch

http://www.mediafire.com/download/wh9b3tj7bjv0loo/anshuluino1.brd

anshul sanam wrote:

I'm a beginner in eagle and I designed a PCB and I am ready to send it

off to the PCB fab house.

but I need to make sure the board is gonna work cause I dont wanna

spend 40 dollars on the PCB and have it short or not work.

 

Things I would change

1) The tPlace font is Proportional, make it Vector so you get what you see.

2) Move the text off the pads, The board house will chop the characters to

bits to satisfy this. Best you move the text so its readable when the board

comes back.

3) Text like R4 will not come back readable as it is to thin. Currently the

characters are 16mil high and the strokes of the chars  are 8% of that,

about 1.2mil. Your board house likely has a >5mil  recomendation  for

printed objects

4) All the servo connectors have power connections with only three spokes of

the thermal connected. with some shifting of nearby traces they could have 4

spokes giving greater strength and current capability.

5) Reduce the wire size for the polygon pours to 10mil, It gets rid of a few

unclosed regions.

6) Move R8 further left, its quite near the board edge. Align it with R5

pad.

Last thing. When you generate your gerbers, view them in a gerber viewer

before you send them off.

HTH

Warren

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thanks a lot for the suggestions i didnt understand how you could get 4 thermal spokes do i just move nearby traces further away, also do you think everything else is fine, and is there a good chance I will get it working after i get the real PCB back

do you think the voltage dividers for the sensors are proper

anshul sanam wrote:

thanks a lot for the suggestions i didnt understand how you could get

4 thermal spokes do i just move nearby traces further away, also do

you think everything else is fine, and is there a good chance I will

get it working after i get the real PCB back

 

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Hi

The thermal spokes are formed when the polygon pour fills. Currently the

pour, made with the same width wires as you define the polygon outline with

(your 10 or 16 mil wires), cannot fit all the way around certain places so

you have to make it possible for them to get in there. You need to move

traces, or other objects that  require clearances, out of the way for that

to happen. From what I could see that would be an easy job.

I can't comment on whether every thing else is fine or that it will all work

when the PCB comes back, that depends on your electrical design. If the

schematic was wrong then the circuit may not work. Ensure you run an ERC

check  That should pick up any missing connections.

What I'm helping you here with is applying better PCB design practice,

hence reducing the chances that the PCB will contribute to any problem

initially or during its life.

The end goal for any PCB is one that is electrically correct and strong so

that it resists the abuse it will be subjected to during assembly

(soldering) and during it's life.

All the best

Warren

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I have made a final revision which Im confident on. I just want to know if you guys think it correct

schematic - http://www.mediafire.com/download/qq1kudnnalgebel/anshuluinonewnew.sch

board - http://www.mediafire.com/download/2ld2l1ijhulftk7/anshuluinonewnew.brd

thanks

I get

Loading C:/Program Files/EAGLE-6.2.0/projects/someone elses/anshuluinonewnew.brd ... 

Warning(s):

line 356: unknown attribute 'name' in tag <designrules>

when I try to load this.

Text of that LED is overwriitne by another text.

Maybe add a bypass cap on chip's VCC also?