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Amega328p-au shorted pins ? [message #169857] Thu, 02 March 2017 12:14 Go to next message
Anonymous Coward
Finally motivated myself into trying Eagle files only to see my original instincts told me NOT to bother.The last thing I expected was not finding common components in the library.My first mistake to assume that an Atmega328p-au would be one of the easiest to find.Not so and had to search the ends of the earth to find it and manually place it into the LIBR directory.After a 4 hour search and finally having this IC in my schematic layout I now see "shorts" on several pins of this chip in the BRD window.The worse possible places no less on 3.3v and ground !!I can probably modify this file but now getting far deeper into a simple project I thought would be straight forward.Is it a software glitch causing this or a bad library file ?Anyone know where to find a working Atmega328p-au footprint?See attached screen shot of the issue.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217232?tstart=0#217232
Re: Amega328p-au shorted pins ? [message #169858 is a reply to message #169857] Thu, 02 March 2017 13:17 Go to previous messageGo to next message
Anonymous Coward
Hi James, James Zelazny jr wrote: Finally motivated myself into trying Eagle files only to see my original instincts told me NOT to bother. I get it you are feeling frustrated, the first time I tried to use EAGLE it didn't go so well. I had to sit down and read the manual and tutorials to understand how it works as previously I had spent a lot of time with DxDesigner/PADS and OrCAD, and EAGLE was quite a change from both of these. James Zelazny jr wrote: The last thing I expected was not finding common components in the library.My first mistake to assume that an Atmega328p-au would be one of the easiest to find.Not so and had to search the ends of the earth to find it and manually place it into the LIBR directory.After a 4 hour search and finally having this IC in my schematic layout  So the issue here is assuming the bundled parts library is useful. As with the "free" parts libraries that are bundled with absolutely all ECAD packages, not just EAGLE, you get what you pay for. If you value your time and the integrity of your designs you'll just create your own libraries. It's actually quite easy once you've done a few parts. There are great tutorials to get you started on Adafruit and Dangerous Prototypes. To start this from scratch and do it properly yourself would have been a fraction of the time you spent searching. James Zelazny jr wrote: .After a 4 hour search and finally having this IC in my schematic layout I now see "shorts" on several pins of this chip in the BRD window.The worse possible places no less on 3.3v and ground !!I can probably modify this file but now getting far deeper into a simple project I thought would be straight forward.Is it a software glitch causing this or a bad library file ?Anyone know where to find a working Atmega328p-au footprint?See attached screen shot of the issue.It looks like it's just showing air wires between pins on the same net, not between nets i.e. it's connecting all the GND and separately all the 3.3V but I am a little perplexed why as it doesn't look like you have any nets added on the schematic and dropping in a part with multiple pads on the same pin of the part doesn't show air wires for me until I connect up a net in the schematic. Could you put the lib/sch/brd files up on here so we can take a look at what you have done please? Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217208?tstart=0#217208
Re: Amega328p-au shorted pins ? [message #169859 is a reply to message #169857] Thu, 02 March 2017 13:39 Go to previous messageGo to next message
Anonymous Coward
The screenshot is just me adding the very first component into the work space.I did nothing but add the library file for the Atmega328p-au,started the program and was the very first component selected.I did nothing but check the board view to find these pins already wired.I spent an entire day downloading as many components for my project as possible and had it just about completed on the second day when I discovered many wires in places that should not have been.So,cleaned the slate and even re-installed Eagle and started over.This time I wanted to place a component and do little at a time while checking for bogus traces.That is when I finally discovered these connections right off before even starting the project...just merely adding the component and this shows up.I also would like to note that sometimes the program crashes and will lose my work unless I save each and everything I do.Frustrated is a mild term at this point.So basically,I open the program,create a project and the first thing I do is select the Atmega328p-au and put it into the schematic work space...and that is what I am getting.I have done nothing else.Here is the file I used and wonder if it is just a bad file itself ?https://www.snapeda.com/parts/ATMEGA328P-AU/Atmel/view-part/ Give it a try and see what you get ?
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217209?tstart=0#217209
Re: Amega328p-au shorted pins ? [message #169860 is a reply to message #169857] Thu, 02 March 2017 13:54 Go to previous messageGo to next message
Anonymous Coward
Ok,I found another library file for the Atmega328p-au and it seems to work without those mysterious traces.But again,still getting an error when switching to board view.Always something new to deal with I need to now either fix this error or switch to another machine.Now using Win XP Pro and may try Windows 10 machine next.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217210?tstart=0#217210
Re: Amega328p-au shorted pins ? [message #169861 is a reply to message #169857] Thu, 02 March 2017 14:00 Go to previous messageGo to next message
Anonymous Coward
Hi James, I've downloaded it and what it is doing isn't wrong as such. The VCC and GND pins on that part have their pin type set to PWR. When you place them on the board they try and connect up to identically named power nets from other devices with pins of type PWR. As soon as you connect them up to what you want them to connect to then if they are different they will no longer connect to the other devices. Does that make sense? I tend to not use the PWR pin type in my devices (although I was experimenting with it recently to make a ULP simpler, I will go for the hard approach now I have seen this but that's a different story) so I haven't had this happen before. It's not a problem as log as you fully connect everything up how you want in the schematic and don't end up with connections you didn't intend because it used device PWR pin names to guess at connections. Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217257?tstart=0#217257
Re: Amega328p-au shorted pins ? [message #169862 is a reply to message #169857] Thu, 02 March 2017 14:03 Go to previous messageGo to next message
Anonymous Coward
I'd recommend you learn how to create your own libraries rather than searching and downloading them. It'll be less hassle and a lot quicker in the long run. As for your windows related crash, sorry I can't help you there, EAGLE 7.7 runs perfectly on both my Mac and Linux machines. With Windows you're on your own I'm afraid  Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217258?tstart=0#217258
Re: Amega328p-au shorted pins ? [message #169863 is a reply to message #169857] Thu, 02 March 2017 14:05 Go to previous messageGo to next message
Anonymous Coward
I was ok with it connecting grounds and power,but looked to me one was going from ground to power pins?3.3 to ground I think.I now have another file that does not do this and feel better about using it instead...automation is not something I care for.Like spell check...even that is wrong sometimes Thanks for the replies and now going to see if I can get something actually accomplished here.By the way,using this tutorial and so far getting me through -https://youtu.be/1AXwjZoyNno
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217259?tstart=0#217259
Re: Amega328p-au shorted pins ? [message #169864 is a reply to message #169857] Thu, 02 March 2017 14:12 Go to previous messageGo to next message
Anonymous Coward
James Zelazny jr wrote: I was ok with it connecting grounds and power,but looked to me one was going from ground to power pins?3.3 to ground I think.It may have looked that way but it really wasn't I quickly routed in the GND and the 3V3 was going correctly between its two pins. It just looked that way because the air wires were overlapping. James Zelazny jr wrote: I now have another file that does not do this and feel better about using it instead...automation is not something I care for.Like spell check...even that is wrong sometimes So long as you are happy with it. Please do THOROUGHLY check it against the datasheet though as it could have mistakes which would ruin a PCB. You must check all parts you get from elsewhere. James Zelazny jr wrote:  Thanks for the replies and now going to see if I can get something actually accomplished here.You are welcome, Good luck! James Zelazny jr wrote: By the way,using this tutorial and so far getting me through -https://youtu.be/1AXwjZoyNnoJeremy Blum's youtube tutorials are pretty good to get you going I think. Do look at the Adafruit and Dangerous Prototypes tutorials on creating library parts though and then read the EAGLE manual once it's all starting to make sense  Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217260?tstart=0#217260
Re: Amega328p-au shorted pins ? [message #169865 is a reply to message #169857] Thu, 02 March 2017 17:30 Go to previous messageGo to next message
Anonymous Coward
rachaelp wrote: I'd recommend you learn how to create your own libraries rather than searching and downloading them. It'll be less hassle and a lot quicker in the long run. As for your windows related crash, sorry I can't help you there, EAGLE 7.7 runs perfectly on both my Mac and Linux machines. With Windows you're on your own I'm afraid Creating your own libraries is good advice, You're not relying on another party getting the design right. Only just today I have downloaded the latest version of Eagle (for Mac) and attempted to create parts for a new design. Unfortunately the library editor seems to continually crash. It seems to be a known issue: https://forums.autodesk.com/t5/eagle-forum/editing-device-crashes-eagle-8/td-p/6879433  I would recommend you stick with version 7.7. At least for now.  I'm going to have a look at KiCad.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217236?tstart=0#217236
Re: Amega328p-au shorted pins ? [message #169866 is a reply to message #169857] Thu, 02 March 2017 17:39 Go to previous messageGo to next message
Anonymous Coward
Paul Ellison wrote: Only just today I have downloaded the latest version of Eagle (for Mac) and attempted to create parts for a new design. Unfortunately the library editor seems to continually crash. It seems to be a known issue: https://forums.autodesk.com/t5/eagle-forum/editing-device-crashes-eagle-8/td-p/6879433 I would recommend you stick with version 7.7. At least for now.  I'm going to have a look at KiCad.Yes, license issue aside (I don't want that to kick off in this thread too!), it seems the 8.0.x releases are not fit for purpose at the moment. I've had numerous crashes and the latest v8.0.2 seems to have the most dysfunctional library editor yet.... Fortunately I have a 7.7 Ultimate license which I will be sticking with until such time v8 works reliably and they have some worthwhile new features. Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217270?tstart=0#217270
Re: Amega328p-au shorted pins ? [message #169867 is a reply to message #169857] Thu, 02 March 2017 18:26 Go to previous messageGo to next message
Anonymous Coward
I appreciate the advice and the replies to help out.However,the program crashes too much now every time I go to the board view.This will all be a waste of time even if I get a schematic finished.By the time I drag all the components in board view it crashes and can not even check my work.Since my project is to fly on balloons and never be seen again,I may just make hand crafted surfaces(cardboard/plastic) And glue the components to that. Then use very thin magnet wire to connect the components.The bright side is I can take normal showers,eat dinner,get normal sleep and save money on PCB`s I even think I can reduce the weight over PCB materials which was the goal anyhow.A fine tip soldering iron and steady hands will do the trick.I just want progress.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217237?tstart=0#217237
Re: Amega328p-au shorted pins ? [message #169868 is a reply to message #169857] Thu, 02 March 2017 18:32 Go to previous messageGo to next message
Anonymous Coward
Hi James, Maybe don't give up just yet, maybe we can help get you up and running. Try one more thing. Download and install v7.6 and see if that is any more stable. I don't have any issues with v7.7 myself on Mac/Linux but I have seen elsewhere somebody having issues with v7.7 and saying v7.6 worked fine for them. You can get v7.6 from ftp://ftp.cadsoft.de/eagle/program/ Another thing to check is that you installed it in the default location in C:\EAGLE<somethingorother> or did you change it to a custom location? It is known to not work right if you don't let it install to the default location. Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217287?tstart=0#217287
Re: Amega328p-au shorted pins ? [message #169869 is a reply to message #169857] Thu, 02 March 2017 18:34 Go to previous messageGo to next message
Anonymous Coward
James Zelazny jr wrote: I even think I can reduce the weight over PCB materials which was the goal anyhow. You can specify thinner than standard PCB's and they would be really light. Look at all the options on Eurocircuits as an example. You end up paying quite a bit more for non standard builds though. Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217288?tstart=0#217288
Re: Amega328p-au shorted pins ? [message #169870 is a reply to message #169857] Thu, 02 March 2017 18:34 Go to previous messageGo to next message
Anonymous Coward
Just to get an idea how NOT concerned I am with cosmetics but rather function here is previous builds.My goal now is to reduce weight and wanted to go with surface mounted components.In reality,swapping out an Atmega328-pu with a 328p-au is a small reduction in weight.Adding the PCB pretty much replaces the weight I saved.so trying to be smart not pretty https://www.qrp-labs.com/flights/u3s7
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217238?tstart=0#217238
Re: Amega328p-au shorted pins ? [message #169901 is a reply to message #169857] Fri, 03 March 2017 13:46 Go to previous messageGo to next message
Anonymous Coward
Since I hate to go down without a fight,here is an example of what is happening when I try simple things using Eagle.Is it something I am doing wrong or is this an issue with software on my machine?The version of Eagle I dug up from backup CD`s since V8 and V7 was not working.It appeared this older version was working much better but after making this video,it crashed while sitting in board view so now I have 2 issues again.Here is a short video of what I am trying to accomplish starting with 3 components and a simple crystal connection.https://youtu.be/oZavqxPt9U0 Ignore the sound,that was a ham radio tied into my sound card by mistake.Also,this error popped up while processing this video and has been doing this on both working versions of Eagle.But you can still see a missing connection on that crystal.I may just be SOL with this project and will try a newer machine today and see how that goes.Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217392?tstart=0#217392
Re: Amega328p-au shorted pins ? [message #169902 is a reply to message #169857] Fri, 03 March 2017 14:46 Go to previous messageGo to next message
Anonymous Coward
All my problems are because of Windows XP C++ library issues and always no solution.Been down this road 100`s of times and this happens with some programs and not others.Not going to waste my life on fixing it.However,installed the latest version of Eagle onto a newer laptop here,transferred my new LBR files and first shot everything works like it should.Going to get to work,enough time wasted already.Thanks for those who tried to help and maybe this posting will help someone in the future rather than wasting time.Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217353?tstart=0#217353
Re: Amega328p-au shorted pins ? [message #169903 is a reply to message #169857] Fri, 03 March 2017 14:48 Go to previous messageGo to next message
Anonymous Coward
Hi James, Thanks for the updates. If you continue to use EAGLE on your newer laptop, there's plenty of people here to help out if you have any further questions. Good luck with you project! Best Regards, Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217382?tstart=0#217382
Re: Amega328p-au shorted pins ? [message #169909 is a reply to message #169857] Fri, 03 March 2017 20:51 Go to previous messageGo to next message
Anonymous Coward
Rachael,Thank you for your patience.So far have made up some of my schematic.I`ll do a bit here and there and check over the work as I go.Still some things to learn but feel pretty good about the way it works so far.No crashes yet and the latest version is far better to use with noticeable changes from previous versions tried.My circuit is very basic compared to most out there so should go fairly well.Even if it doesn't,at least this time have a chance I`ll probably be back with some questions eventually and hope help will be available.Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217437?tstart=0#217437
Re: Amega328p-au shorted pins ? [message #169923 is a reply to message #169857] Mon, 06 March 2017 19:56 Go to previous messageGo to next message
Anonymous Coward
Thought to share the work done already on my schematic but pretty sure there are errors somewhere along the line.The biggest hurdle so far is getting a crystal connected to an IC.Not really sure why it does not show up properly in board view but here is my goal.See drawing -When I try this the caps end up on the IC pins and the crystal on the opposite side.I do not think the circuit will function properly this way.I am making connections exactly as the diagram shows.Missing a step somewhere ?
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217693?tstart=0#217693
Re: Amega328p-au shorted pins ? [message #169924 is a reply to message #169857] Mon, 06 March 2017 19:58 Go to previous messageGo to next message
Anonymous Coward
Here is my schematic and board view.Seems the crystal pins should be connected to the IC and the caps after that to ground the way it was drawn ?
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217694?tstart=0#217694
Re: Amega328p-au shorted pins ? [message #169925 is a reply to message #169857] Mon, 06 March 2017 20:03 Go to previous messageGo to next message
Anonymous Coward
Maybe it is correct and I am not used to organizing things properly on board view?
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217695?tstart=0#217695
Re: Amega328p-au shorted pins ? [message #169926 is a reply to message #169857] Mon, 06 March 2017 21:49 Go to previous messageGo to next message
Anonymous Coward
Hi James, I think it's probably ok. If you place the crystal where you want it, near the IC pins and then the caps the other side where you want them, if you then press the ratsnest button or type RAT <return> you should see it re-optimise the air wires to the order you expect. The other thing to note is in the image of the schematic above it is warning about forward and back annotation being severed. You need to make sure you always have both the schematic and board open and never make any changes that will affect the netlist when one or the other is closed otherwise you will end up in a mess. Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217671?tstart=0#217671
Re: Amega328p-au shorted pins ? [message #169927 is a reply to message #169857] Mon, 06 March 2017 22:37 Go to previous messageGo to next message
Anonymous Coward
Thank you for the note.Still need to learn about the options the program has yet plus need to orient my head to seeing a circuit rather than a diagram.This has been a big transition to me since my projects were mostly been accomplished using diagrams rather than schematics.I`ll get used to this yet.Appreciate the help once again.I need to adjust my eyes and look this over a bit closer.Auto routing helped a lot so far rather than a spaghetti of lines Also,being very careful when checking from schem to board not to change anything to goof it all up.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217679?tstart=0#217679
Re: Amega328p-au shorted pins ? [message #169945 is a reply to message #169857] Wed, 08 March 2017 15:49 Go to previous messageGo to next message
Anonymous Coward
After several days and many hours I am giving up on Eagle.My project is too simple and struggling with this software is making it much harder than it should be.This has been tried on 3 machines to eliminate OS as the cause.Searched high and low for footprints and symbols for my specific components.Read every forum post and video and nothing works like is said or seen.In the end,I took 3 simple components which were a pair of identical 5 pin headers and a 10 pin IC (Si5351a) and simply connected the pins to just that all by itself.I get nothing but errors all day long.Just downloaded the complete Adafruit Si5351a ,BRD/SCHEM and ran it into Eagle using all and every method learned from videos and forums and still it shows the same errors.I changed drills,mils and mm`s and other settings and sizes with no results...not even slight changes.Since my project is not protecting the universe,going to mount these tiny components onto thin light material using glue and soldering point to point.The time spent on software and computers was time spent soldering Thanks for the help but time to move forward.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217859?tstart=0#217859
Re: Amega328p-au shorted pins ? [message #169946 is a reply to message #169857] Wed, 08 March 2017 15:51 Go to previous messageGo to next message
Anonymous Coward
I think someone needs to try the Si5351a synthesizer chip first and could be Eagle free version is incapable of using it?
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217860?tstart=0#217860
Re: Amega328p-au shorted pins ? [message #169947 is a reply to message #169857] Wed, 08 March 2017 15:56 Go to previous messageGo to next message
Anonymous Coward
Hi James, Can you post up a sample of the errors you are seeing here please so we can see what's happening? Also, can you attach the .lbr file you found containing the Si5351a and I will take a look at it. Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217851?tstart=0#217851
Re: Amega328p-au shorted pins ? [message #169951 is a reply to message #169857] Wed, 08 March 2017 17:00 Go to previous messageGo to next message
Anonymous Coward
I think this is what I have been using - https://www.snapeda.com/parts/SI5351A-B-GT/Silicon%20Labs/view-part/Also,tried using this schematic and get the very same clearance issues with the Si5351a.https://github.com/adafruit/Adafruit-Si5351A-Clock-Generator-Breakout-PCBI even tried to route my own but can not seem to make the traces small enough.They end up touching.But even using the plain Si5351a chip on a pair of 5 pin headers the clearance error continues.I just can not seem to fix this error.Had the entire schematic made and remade several times and getting tired.Tried the board portion equally as much and everything in between.Following the video steps exactly and getting different results.I should describe this circuit.My goal is to shrink down a circuit I already successfully use for high altitude balloons.It consists of 3 stages,GPS SI5351 Atmega328p-au My current working setup is crude and was hoping to go 100% surface mount to drastically reduce weight.My total weight now is about 28 grams and feel surface mount will greatly reduce it even more.The reason for this weight loss is also reducing balloon size and helium reduction therefore increasing altitudes.I only get around 30k feet and need to get at least 35 - 40k to avoid storms.That is the plan anyhow.Here you see my old build which may give you an idea what the goal is.So if I hand solder onto construction paper or plain phenolic board,it will all work the same way.Having one neat PCB was just a luxury and seems out of my reach Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217864?tstart=0#217864
Re: Amega328p-au shorted pins ? [message #169952 is a reply to message #169857] Wed, 08 March 2017 17:15 Go to previous messageGo to next message
Anonymous Coward
I`ll just upload my entire schematic.This is not the same as it was since I decided to eliminate traces and thought it would be easier to section out the circuit into 3 sections.Rather than a bunch of traces,tried using headers where later I can hand solder jumpers to avoid all these design issues.Everything will still be on one PCB but some hand tracing involved.It seemed to reduce the headaches except that dreaded Si5351a clearance stuff.Anyhow,here it is.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217866?tstart=0#217866
Re: Amega328p-au shorted pins ? [message #169953 is a reply to message #169857] Wed, 08 March 2017 19:11 Go to previous messageGo to next message
Anonymous Coward
Found another possibility for footprint - CAD/CAE Schematic Footprints and Symbols | Silicon Labs But another program to figure out to go with it .
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217854?tstart=0#217854
Re: Amega328p-au shorted pins ? [message #169954 is a reply to message #169857] Wed, 08 March 2017 21:42 Go to previous messageGo to next message
Anonymous Coward
Another Si5351a library - Starting to Build my Personal EagleCAD Library — Tristan Robitaille
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217896?tstart=0#217896
Re: Amega328p-au shorted pins ? [message #169955 is a reply to message #169857] Wed, 08 March 2017 21:58 Go to previous messageGo to next message
Anonymous Coward
Hi James, Sorry, I haven't been ignoring your posts, I've been out this evening. I'll take a look at what you've posted up in the morning :-) Best Regards, Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217903?tstart=0#217903
Re: Amega328p-au shorted pins ? [message #169957 is a reply to message #169857] Wed, 08 March 2017 22:57 Go to previous messageGo to next message
Anonymous Coward
Just sharing to the group for the records on this topic.No hurry for me and do not expect anyone to solve my issues.I needed to walk away from it awhile and clear my head.Still waiting for the final components to arrive anyhow so will be some time before planning a build.I am sure someone with experience in Eagle will know what I am doing wrong...most likely the fact I need to just keep working on it and learn more.Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217917?tstart=0#217917
Re: Amega328p-au shorted pins ? [message #169961 is a reply to message #169857] Thu, 09 March 2017 00:17 Go to previous messageGo to next message
Anonymous Coward
Decided to try one more time tonight.This time I used the full size board work area without trying to squeeze everything in for a quick run.Also read this issue related - http://www.bot-thoughts.com/2013/09/eagle-sudden-clearance-errors-isolation.html Tried the solution in the post and also ran through my entire design rules settings.Whatever it was I get NO DRC errors now.Since I changed 3 major settings,not sure which it was causing my headaches.Tomorrow going to try rewriting the schematic the way I originally planned and shrink it down to a reasonable size.See what happens.Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217919?tstart=0#217919
Re: Amega328p-au shorted pins ? [message #169982 is a reply to message #169857] Thu, 09 March 2017 15:23 Go to previous messageGo to next message
Anonymous Coward
With the schematic re-drawn like I want,went ahead and tried to make another board.Autorouting shows some connections bad.A run of the DRC once again shows the same issue regarding clearance on the Si5153a IC.I am am bit confused about auto routing since there are few options.This time,I set it up with EFFORT set to high rather than default.I still have a vague knowledge in where this should be anyhow.Still searching out more info.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217963?tstart=0#217963
Re: Amega328p-au shorted pins ? [message #169984 is a reply to message #169857] Thu, 09 March 2017 16:22 Go to previous messageGo to next message
Anonymous Coward
Final schematic.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217968?tstart=0#217968
Re: Amega328p-au shorted pins ? [message #169985 is a reply to message #169857] Thu, 09 March 2017 16:51 Go to previous messageGo to next message
Anonymous Coward
Hi James, I've just had a quick look at your latest schematic and made a quick board with it. The first thing to note is that your silk screen elements in the board your a mixture of vector (correct) and proportional (incorrect) and this will lead to your silk screen on your PCB not looking like you expect when you get your boards back. To have clear and consistent silk screen legends which match the board you must you vector for all your parts. Now, this isn't your fault exactly, its down to relying on poor quality parts sourced from either the bundled "free" libraries or from the internet. Now, onto your DRC problem. When I ran your schematic through to a board and ran DRC, if I don't load a .dru file from the board manufacturer and rely on the defaults, then I get a bunch of clearance errors. I then went and loaded the basic 2-layer .dru file from Eurocircuits and ran DRC and it passed without error. What fab house are you using for your boards? Do they provide an EAGLE .dru file (or files) for their capabilities? If so then load this and run DRC. Then if there are still any errors, examine them on a case by case basis to determine if you really need to worry. With regards the auto router, well you can use it if you must but you wont get the best result. I think it's best used as a tool to help manual routing. Manual is the way to go really and then you can use the auto-router selectively to help you route simple but very repetitive groups of traces. First thing to do though it to get the placement right as that is 90% of the battle. Move things around, rotate etc, even update the schematic if needed to get the air wires to run a cleanly as possible. Remember to run ratsnest regularly so you can see how things are improving. Once you are happy with placement you can then start to route things in. I get critical nets like clocks routed in first, then work your way through the rest, leaving the least critical to last. Make sure your power and grounds are done well and do make sure you have adequate decoupling caps. I don't see any bulk or bypass caps in your design. I know you are trying to save weight but you might need a few. internal power/ground planed in the board will help there too, although again they will add a little weight. Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217969?tstart=0#217969
Re: Amega328p-au shorted pins ? [message #169986 is a reply to message #169857] Thu, 09 March 2017 17:23 Go to previous messageGo to next message
Anonymous Coward
I will start by finding the EAGLE .dru files which I need to check with Oshpark or whoever has the best help in this project.Going to look all this over thoroughly and see about making up new footprints as well.Seems too bad that the footprints I have in my library do not work properly.Most likely some challenges ahead until I learn this stuff.I appreciate you looking this over and for your time.Hopefully this post will help others not to mention a great reference point for myself during this task.Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217971?tstart=0#217971
Re: Amega328p-au shorted pins ? [message #169989 is a reply to message #169857] Thu, 09 March 2017 19:10 Go to previous messageGo to next message
Anonymous Coward
Guessing I need this 2 layer .dru file if I am using Oshpark for my PCB`s ?OSH Park Docs ~ Eagle Design Rules files.
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/217975?tstart=0#217975
Re: Amega328p-au shorted pins ? [message #170026 is a reply to message #169857] Mon, 13 March 2017 12:44 Go to previous messageGo to next message
Anonymous Coward
Just to update my progress,I have seemed to be learning a bit and progressing with this project.The DRU files from Ohpark loaded seemed to help greatly.Also zeroed the NET CLASSES using default.Eventually they are set to 5mil.So the above issue from that link was great help as well.After some minor issues was able to produce a BRD file to upload to Ohpark.I get ZERO DRC errors now and the Si5351a chip (U1) finds traces like it should.Now to look over and double check everything and build a bread board design for programming and testing.If all goes well,will order a few PCB`s and try my hand with SMD.Board - https://644db4de3505c40a0444-327723bce298e3ff5813fb42baeefbaa.ssl.cf1.rackcdn.com/09256ea28b82b0e705c19685ab301150.pngBottom - https://644db4de3505c40a0444-327723bce298e3ff5813fb42baeefbaa.ssl.cf1.rackcdn.com/2c687c3b7069769618305c3053786940.pngThank you here for all the help and patience.Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/218267?tstart=0#218267
Re: Amega328p-au shorted pins ? [message #170028 is a reply to message #169857] Mon, 13 March 2017 13:00 Go to previous messageGo to next message
Anonymous Coward
Hi James, I'm glad you are learning and making progress Hopefully you are finding it more rewarding now you are starting to see some results. I just had a quick peek at the two images you posted up. I have a couple of comments. Firstly, your power net is routed around the board with a really skinny trace. I wouldn't recommend this, especially as you don't appear to have any decoupling caps at the IC pins. I think this is likely to end up being problematic. If it were my board I would try and use polygon fills top and bottom to get your Vcc and GND connected around the board as much as possible. Obviously with a 2 layer board you're going to end up cutting up any polygon fills with all the other traces running around but I would give this a try to see how it works. Secondly, it's obviously auto routed and there are several places where the nets just go really close to things when there is bags of room for them to have a little more clearance. Examples would be the traces running very close to X2 and the ones around J1 but there are plenty of examples all over the board. I'd recommend you have a go at manual routing on the board, you'll pretty much always get a much nicer result. Best Regards,Rachael
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/218268?tstart=0#218268
Re: Amega328p-au shorted pins ? [message #170048 is a reply to message #169857] Tue, 14 March 2017 14:23 Go to previous messageGo to next message
Anonymous Coward
I moved to my programming issues for the time and was worried because after all...if I can not program the 328 it is useless.But yes on your comments in regards to the traces running long.I was just happy to get a BRD file and test it out I can now move stuff around and tighten everything up and add or remove other components.The schematic is designed around an existing circuit and using identical components.I do see room for decoupling caps to the 328 IC.I have not used them in previous build except for the GPS and Si5351 for the obvious reason the y produce RF.I had issues in this regard and is why they were added and the circuit runs well as it is.But to be safe,maybe I will add them to the 328 too.I was not too worried about the power traces being so small since the input voltage will be merely a 3.7 lipo @ 100mah then into the 3 voltage regs for an output of 3.3v.I used 3 regs for each module,328/gps and si5351 as to not stress one for everything.My previous build was using 5v directly from 5v boost module from a lipo 3.7v/100mah battery.No voltage regulators except the onboard regs of the 5351 and GPS.The 328 IC was ok since it runs 5v max anyhow.This board was to emulate the identical circuit only eliminating the 5v boost module to reduce weight and components needed.My GPS modules arrived and weigh only .9 grams where the prebuilt GPS is like 7 grams.The Si5351 prebuilt for 5v weighs about the same and that has be drastically reduced as well.So big time gains regarding weight loss on this.I should mention it also will have solar cells attached.The battery and solar input have 3 connections one for batt and the other for solar cells.Added a blocking diode between batt/soalr to prevent voltage from absorbing into the cells.It seems to work great that way.The cool part is the batteries I buy are tiny and have a built in over charge circuit...ready to use.Thanks again for you assistance and comments.VERY helpful and will come back to post my revised board and maybe a working board !!
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/218384?tstart=0#218384
Re: Amega328p-au shorted pins ? [message #170050 is a reply to message #169857] Tue, 14 March 2017 17:27 Go to previous message
Anonymous Coward
Setup a duplicate of the circuit on bread board to run a test.It will be a first using 3.3v rather than 5v.I had to change one of the 328 fuses to do this and that is about it.So far,it started without issues.Waiting for a clean calibration by GPS which takes some time.No RF issues causing problems even with all the wires sticking up.This is a good sign.Firmware looks like it uploaded properly.Jim
EAGLE support forums at www.eaglecentral.ca :: Where the EAGLE community meets.

Original article at https://www.element14.com/community/message/218380?tstart=0#218380
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