Unable to delete certain object.

Hi Aaron,

From the picture and the description its not immediately apparent to me what you are trying to delete. There are a couple of things to try off the top of my head, first check that you have the tOrigins layer turned on. Without tOrigins you can't select a component and therefore wont be able to delete it. Secondly check that it's not locked. Right click on the object and you get get a pop up context menu. If it says "unLock" in the menu then it is currently locked. If this is the case select the "unLock" option.

I assume you have both the schematic AND the board file open together? If not then they will be out of sync and will mean back annotation wont work. The other thing which could be stopping you deleting is that components should be deleted from the schematic and not from the board. If this was the error you'd get a pop-up message telling you so which as you haven't said this is probably not the case.

Best Regards,

Rachael

rachaelp wrote:

 

I assume you have both the schematic AND the board file open together? If not then they will be out of sync and will mean back annotation wont work. The other thing which could be stopping you deleting is that components should be deleted from the schematic and not from the board. If this was the error you'd get a pop-up message telling you so which as you haven't said this is probably not the case.

On reading back what I wrote and looking at what you are doing again, I actually now think you have just the board open and are deleting components directly from there. If so then this is probably not what you want to do. Re-download the files if you don't have an unedited copy of the board and open them both up and then delete what you don't want from the schematic. They will all be removed from the board by the automatic back annotation. Then switch to the board and tidy up and tracks and polygons which remain that you no longer need.

Best Regards,

Rachael

Thanks Rachel for your input. Actually I started from deleting components from the schematic, then I realized there are few things that can only be deleted from the board window, i.e. ground pour, text, Via etc.

So I'm down to this components in the schematic, https://s28.postimg.org/kgykri2i5/capture2.png.

If the picture isn't really clear, I've uploaded a schematic of it, https://www.dropbox.com/s/1x6jtwo055v150h/Arduino_MEGA_2560-Rev3.sch?dl=0

I downloaded the eagle files directly from Arduino's website, is there a chance that is prevents me from deleting some components because it comes in the package?

Hi Aaron,

So it's the 6 holes you need to be able to delete then? I downloaded and had a look at the Mega 2560 schematics from Arduino's website and I could delete the holes once I turned the holes layer (45) on.

Best Regards,

Rachael

Nope, I'm referring to the top layer in the middle(red in color). I need the 6 holes as I need to do some design using the pin layout.

Ok, I must be completely misunderstanding what you are trying to achieve. That's the pads of the ATMEGA2560 which is still in your schematic. I thought you wanted to keep this?

Okay maybe I'll need to rephrase my question.

So in the board window, there are currently few layers on it, one of them is the top layer right? Which is in red colour(refer to the image in my very first post).

Problem: I want to keep all the other layers except for the top layer(red color layer) for now, but the delete function does not seem to function for me.

I apologize if I still sound crazy haha, this is my second try at eagle.

Aaron Qwe wrote:

 

I apologize if I still sound crazy haha, this is my second try at eagle.

I'll be honest, it does a little but maybe that's because I don't understand what you are really trying to achieve so lets take a step back. So why don't you want the top layer of the board?

The pads of the ATMEGA2560 which are on the top layer are part of the component. You can't just remove those unfortunately. Why do you want the ATMEGA2560 in the schematic if you don't want it's pads on the board?

Well my objective is to only have the pin spacings from the original board layout. From there, I'll introduce some connectors that will connect to some of the I/O pins of the Arduino Mega.

So my understanding on how to achieve this was to remove everything except for the drill/hole that is situated at the I/O pin, including the pads of the ATMEGA2560 because I thought that including it would have it been fabricated too.

Well my objective is to only have the pin spacings from the original board layout. From there, I'll introduce some connectors that will connect to some of the I/O pins of the Arduino Mega.

So my understanding on how to achieve this was to remove everything except for the drill/hole that is situated at the I/O pin, including the pads of the ATMEGA2560 because I thought that including it would have it been fabricated too.

You may want to follow a different approach and have a look here:

https://www.element14.com/community/community/arduino/blog/2013/11/05/finally-an-arduino-library-for-eagle

Markus

So you just want to make a generic board template on which to base your own board which will will plug into an Arduino?

If that's the case just delete the ATMEGA2560 from the schematics, nothing you have said gives any reason for it still to be there as far as i can see.

Definitely would look into it! Thanks

Yeap, I tried doing that from the schematics, but all I get is a "blank" sound notification. I cant select the ATMEGA whatsoever or do anything with it.

That's really odd as it deletes fine for me. Are you sure you are clicking near to the origin of the symbol which in this case is right in the middle of the symbol. I get the "boing" sound if I try to click too far away from the origin.

I decided it would just be easier to do it for you as it was only a 2 minute job to clear everything out and zip it up. See the attached......

Yes, it is exactly as you said. I tried clicking way further than the origin. Thanks for the help!

I actually have one more question, referring to what I want to do. Do I use holes or drills if what I want to do is just introduce some connectors and make connection to to the I/O pins?

From my understanding I would need to use drills right?

Hi Aaron,

It sounds like what you are describing there is plated through holes which in EAGLE can be done in the board by adding a via with a large drill size setting and giving it an appropriate name to match the net it is to connect with. Alternatively (and a better way to do it) you can create a library part for plated holes with various hole sizes specified in the part. You place this in your schematic and wire it to wherever you need and then the pads and air wires will show in the board so you can place it where you need and route it.

But do you want plated through holes or do you want to place a part for a specific connector you wish to add? Again, a component can be created and then this will be added in the schematic and wired up, and will then appear in the board to be placed and routed.

Let me know what you are trying to do and I will give you more specific help if you need it.

Best Regards,

Rachael

On 10/01/17 02:29, Aaron Qwe wrote:

 

I actually have one more question, referring to what I want to do. Do I use holes or drills if what I want to do is just introduce some connectors and make connection to to the I/O pins?

 

From my understanding I would need to use drills right?

 

No.

Rachael has helped you achieve what you were trying to do but I note

Markus gave the rather more significant advice that you're probably

trying to do the wrong thing. I'm still not entirely clear on what your

"end goal" is, but I think you're trying to create a template for

designing shield boards? If so...

Editing an existing Arduino (host) design to get a minimal board is the

wrong approach. What you ideally want is an Arduino shield pin-out as a

library component. This component would have the signal names of the

Arduino as pins on the schematic symbol, and a PCB package consisting of

holes for the mounting holes and through-hole-pads for the header pins.

Then, for each new shield you design, just drop one of these into the

schematic along with all your other components, wire it up, and the

board will have a template complete with all the air wires.

There are a few of these knocking about, including the one Markus linked

to. But to be honest, I designed one from scratch (for the CooCox

"Embedded Pi" but it's much the same) using measurements from Google

searches, and the whole process took less time than this discussion thread.

Rob Pearce wrote on Tue, 10 January 2017 07:57

On 10/01/17 02:29, Aaron Qwe wrote:

 

I actually have one more question, referring to what I want to do.

Do I use holes or drills if what I want to do is just introduce some

connectors and make connection to to the I/O pins?

 

From my understanding I would need to use drills right?

 

No.

 

Rachael has helped you achieve what you were trying to do but I note

Markus gave the rather more significant advice that you're probably

trying to do the wrong thing. I'm still not entirely clear on what

your

"end goal" is, but I think you're trying to create a template for

designing shield boards? If so...

I'm in complete agreement with Rob and Markus here, it's probably not the

best approach as, in the process of doing what you have done, you have

ended up with a board which is the right shape with all the connectors on

it but it's lost the detail of what the pinout of the connectors is so

you'll have to look up on the actual Arduino pinout every time to make sure

you connect things to the right place. It's definitely not the ideal

solution. Using an Arduino library component to provide the starting point

of your shield, all the information which enables mapping of functions to

the correct pins on the connectors is retained.

Best Regards,

Rachael

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