i have a 2.75 x 2.5 board and have never ordered a PCB before.
I would love it if someone could go over my design and tell me what i am screwing up. I have a small window to get this done and i really need to get my board off to get it back in time.
I have to have it by october 17th. Other wise im going to have to solder a bunch of crap.
Shoot me an email if you are interested.
If you help, and i dont get a coaster. ill paypal you $15 for your help.
why don’t you just post the images and schematic here. more than one person will take a look.
Philba:
why don’t you just post the images and schematic here. more than one person will take a look.
Wow, that's going to be expensive...socoj2:
If you help, and i dont get a coaster. ill paypal you $15 for your help.
Id rather now show everybody how much of an idiot i am.
OK, since nobody has emailed me…
Here are the files.
Its an arduino Shield that runs off 24v regulates it down to 12v, powers the arduino and 3 relays off 12v. and the 3 relays switch 24v.
The 3 pots are the only thing i cant figure out, i have 3 Cerment pots with a top adjustment and no model number…
Also do you guys have a link that explains what i need to do in order to output everything for Batch PCB?](http://www.4shared.com/file/65097794/868a9748/Cannon_Shield.html)](http://www.4shared.com/file/65097781/effb5286/Cannon_Shield.html)
First step is to run ERCsocoj2:
Its an arduino Shield that runs off 24v regulates it down to 12v, powers the arduino and 3 relays off 12v. and the 3 relays switch 24v.
There are 21 errors that need to be fixed (these appear
to be missing component values).
Second step is to run DRC
There are 322 errors that need to be fixed (these appear
to be clearance and stop mask violations).
Of major concern is the use of 48V relays on 12V power.socoj2:
The 3 pots are the only thing i cant figure out, i have 3 Cerment pots with a top adjustment and no model number…
In addition there are no back-EMF diodes across the relay
coils, and its doubtful that a 50mA (max) opto-coupler
can drive a relay in the common-collector (emitter follower)
configuration.
Has any of this circuit been tested (prototype or simulation)?
[[Start here](http://tinyurl.com/497nc2)](http://tinyurl.com/497nc2)socoj2:
Also do you guys have a link that explains what i need to do in order to output everything for Batch PCB?
bigglez:
First step is to run ERCThere are 21 errors that need to be fixed (these appear
to be missing component values).
Second step is to run DRC
There are 322 errors that need to be fixed (these appear
to be clearance and stop mask violations).
Do i need to put the Component Values in? and i couldnt figure out how to fix the clearance problem.
bigglez:
Of major concern is the use of 48V relays on 12V power.In addition there are no back-EMF diodes across the relay
coils, and its doubtful that a 50mA (max) opto-coupler
can drive a relay in the common-collector (emitter follower)
configuration.
Has any of this circuit been tested (prototype or simulation)?
The relay is actually a 12v Relay, that particular one is the only one that matched the pattern i could not find one with the right specs that matched the pin pattern.
Its also a 150 ma Darlington driver. And yes this works on the bread board.
bigglez:
[Start here[/quote]I looked at that. It didnt tell me how to output the files to zip up… Sorry first time i have ever done this.](http://tinyurl.com/497nc2)
It's up to you. Keeping them secret is one option, butsocoj2:
Do i(sic) need to put the Component Values in? and i(sic) couldnt figure out how to fix the clearance problem.bigglez:
There are 322 errors that need to be fixed (these appearto be clearance and stop mask violations).
in the long run you will benefit from having less paper
work to wrangle when you build the board and test it.
If the values were there I would have checked your
design, even though you only asked for PCB assistance.
I would work the project to remove all ERC and DRC
errors before sending it to fab. Once its sent you have
to wait a long time to see the result, and the fees are
non-refundable. Its your call.
Okay, in the long run you can edit the parameterssocoj2:
bigglez:
In addition there are no back-EMF diodes across the relaycoils, and its doubtful that a 50mA (max) opto-coupler
can drive a relay in the common-collector (emitter follower)
configuration.
Has any of this circuit been tested (prototype or simulation)?
The relay is actually a 12v Relay, that particular one is the only one that matched the pattern i could not find one with the right specs that matched the pin pattern.
of the "found’ library parts, or clone them to make
your own. EAGLE binds the library parts to the sch
brd files, so you don’t have to port libraries to others
with EAGLE tools.
Good to hear that you have tested this design!socoj2:
Its also a 150 ma Darlington driver. And yes this works on the bread board.
I was going by the device spec:
Ok after a whole bunch of googling.
They where just rule check errors and nothing that would have been critical to the design, i scaled back the size of the mask, and it cleared all of the clearance problem.
The Solder mask stuff is for pads that the outline of the component over rides like the 3 opto couplers and the Pots.
The Drill stuff is the only thing i havent figured out. and i am thinking it is not detrimental to the fab process either. i hope not i am hoping to get this ordered today.
socoj2:
They where just rule check errors and nothing that would have been critical to the design, i scaled back the size of the mask, and it cleared all of the clearance problem.The Solder mask stuff is for pads that the outline of the component over rides like the 3 opto couplers and the Pots.
The Drill stuff is the only thing i havent figured out. and i am thinking it is not detrimental to the fab process either. i hope not i am hoping to get this ordered today.
Good. Now are you going to work on the electrical
issues before sending it to fab?
For reviewing designs with people over the web you may be interested in using CircuitPeople’s free gerber viewer. To get the gerbers out of EAGLE:
Open your .BRD File
Go to the file menu and select “CAM Processor”
Go to the file menu and select “Open > Job…”
Select gerb274x.cam and Click “Open”
Click “Process Job”
You should find a set of new files in the directory with the .BRD file. Zip those files together and upload them at www.circuitpeople.com.
You’ll have a nice set of PNG images you can download, then attach to messages here for people to review. You can also skip the attachments and just paste the link, like this:
http://www.circuitpeople.com/ViewPackag … eef00b11de
That’s what I got from your .BRD file. Frankly, your PCB fabricator is going to have fits with the two parallel traces on the solder side copper. Not a good thing. You should either merge them of space them at least 0.010" apart.
Or just use export from eagle. Create the view you want people to see, go to file/export/image. I use the clipboard option and then use MSPaint to write a gif or png. Then you can send the resulting file anywhere.
But "cp" the poster = "circuitpeople" the product.Philba:
Or just use export from eagle.
You just blew a big hole in their infomercial…
Gee, guess I’m a little dense…
It did seem pretty contrived to use a web service.
Philba:
Gee, guess I’m a little dense…It did seem pretty contrived to use a web service.
Maybe for some. But, last time I checked this forum didn’t allow attachments. And, as I post this I’m not seeing the option now. Hence the need for external hosting. In my simple-minded POV, sharing the design as a layer-by-layer image set is a pretty useful service.
CP isn’t for everyone, but since it’s free and doesn’t require registration I’m not sure what I would be “infomercialing” here… Maybe “please use some electrons from my server – first 88 trillion free!”?
It’s contrived because a) it’s easier to just export the views you are looking at, b) gerbers have less info for reviewers and c) the schematic is much more important.
Relax, that CP thing looks fairly handy.
I agree that the schematic is important, but personally I’m unlikely to put that much effort into reviewing the work of someone random from a forum. Even the schematic alone is woefully unlikely to give you the information that you’d really need. Where are the fast edges likely to be? Which traces will need to carry a lot of current? That information can be very tricky to determine from many schematics.
Plus, I use Protel. I can’t do squat with EAGLE files, nor do I want to. If you provide images, I’ll cast an eye over them without any problems. But you need to upload them somewhere and not everyone has web space.
As CP pointed out, by looking at the files from the CP website, I can immediately see some sketchy routing that should be fixed up. Plus, if it was me, I’d add a ground plane, but that’s not too important at low frequency.
I’m quite relaxed, perhaps you need to chill. Since you aren’t likely to help, I’m not even sure why you are bothering with an opinion.
Those of us that actually do look at the stuff people put up for help like to see the schematic. Sure, people sometimes need help with routing but I’d be willing to bet 90% of help starts with the schematic. Doing the schematic one way and the layout another seems kind of odd to me. If the person is using eagle, it makes more sense to me to just use the export export from there. Additionally, I look at a gerber and without seeing the components, it’s really hard to offer much in the way of advice. For example, the gerber isn’t going to tell you if there is an analog section placed next to a SMPS or other noise source. Kind of hard to help on just copper alone.
I'll keep that in mind...mkissin:
I’m unlikely to put that much effort into reviewing the work of someone random from a forum.
There are three issues here, all subtle.mkissin:
Even the schematic alone is woefully unlikely to give you the information that you’d really need. Where are the fast edges likely to be? Which traces will need to carry a lot of current? That information can be very tricky to determine from many schematics.
(1) Some requests for help refer to the layout
(more often on how to use the layout tools) and
without help from others the PCB design may
fail for these reasons alone.
(2) Other requests for help are to do with the
circuit design and an error here often leads to
an error in the PCB design. The outcome is the
same - a “green coaster”.
(3) The third issue is unique to EAGLE, which is
a powerful tool available to the hobbyist. The
learning curve is very steep. Although the tool
includes two internal checks (ERC and DRC)
new users often don’t use them and would miss
the errors an experienced user would find by
themselves (or avoid as they gain experience).
Assuming that you’re not “cp”, and as you’ve
indicated you’re not going to help others, I
thank you for reading this post.
