Is there any way of altering the pin numbers of library relays?

Am 12.09.2015 um 23:10 schrieb matelot m:

I am using a relay from the library list under relays.

It is LY40 and the diagram looks identical to the relays on the circuit

I am trying to produce a schematic for. Unfortunately the pins are all

wrong, my coil is on pins 13 and 14 instead of pins 1 and 2.

Is there any way of changing them? Has anyone any info about making my

own library items, maybe I could load the relay and alter it that way?

Thanks,

bob

 

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Copy that device in your own library and edit it there.

But watch out, very often the data sheets of devices are shown from the

bottom side,

eagle shows it always from top.

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Mit freundlichen Grüßen / With best regards

Joern Paschedag

I have discovered how to use the library editor since this thread was opened but come to the conclusion that

I copy it and it shows the full 'package' but only parts of the 'schematic'?

device:LY40:LY40

It's as if the full relay is built from the parts of the schematic.

so for some reason I can't get it to show in the schematic page of my editor?

I have downloaded some libraries from other places so it might not even be a library item supplied with Eagle. Is there a way of checking if it is?

I have discovered how to use the library editor since this thread was opened but come to the conclusion that

I copy it and it shows the full 'package' but only parts of the 'schematic'?

device:LY40:LY40

It's as if the full relay is built from the parts of the schematic.

so for some reason I can't get it to show in the schematic page of my editor?

I have downloaded some libraries from other places so it might not even be a library item supplied with Eagle. Is there a way of checking if it is?

I have found that if I copy the relay to my own library I can then load parts of it onto the schematic page.

If I load the coil it shows all the attributes apart from the numbers 1 and 2 that are the pin numbers for the device.

It is these I want to change, the pin numbers for all my relays are 13 and 14 for the coil.

I can see nowhere that this information is kept so it shows up on the library item in schematics alongside each coil pin.

Also I can't find any way of reproducing this method of building a library item with separate components that then appear as one item when I click on add and click on the item from the library list.

How are the numbers alongside each pin produced?

How is the whole relay produced in schematics from two items, the coil and one contact (the LY40 consists of 4 contacts)?

Thanks.

On 15/09/15 11:26, matelot m wrote:

I can see nowhere that this information is kept

It's in the library.

Honestly, all these questions are really basic stuff - have you tried

looking at the instruction manual? Or one of the many tutorials out there?

CadSoft Guest wrote:

Honestly, all these questions are really basic stuff - have you tried

looking at the instruction manual? Or one of the many tutorials out there?

 

Honestly , always the sarcastic comments when someone is just asking for help.

Reading extensively through the manual and tutorials, I can alter all the attributes of the relay and even change the <name> of the pin from 1 to 13 but it still shows up as 1 when I load it into my project. As I have said above I must be doing some thing wrong because "I can see nowhere that this information is kept" that lets me alter the number that shows up alongside the coil pins in my project.

If I am doing right and altering the name then it is not showing up as the new name if I try to start a new project and load the relay from the library.

Hi,

First point:

When you edit a symbol in you library, on each pin you can select some parameters (open the properties window on the selected pin).  The 'Visible' parameter let you select if you wish to see on your symbol :

- the 'pin name' (name of the pin in the symbol),

- the 'pad name' ( name of the corresponding pad  of the package).

- both

-  no names at all.

If you alter the pin name, and if the pin's Visible parameter is set to 'PAD', you will never see any change !

Same way, if you alter the PAD name, and if the pin's Visible parameter is set to 'PIN', you will never see any change !

Second point.

In a Project, when you place a part from a library, Eagle copies the part  from the library into the board and schematic. So if you edit  later this part in the library, the changes will NOT be visible in your project, since the project will still have the previous version.

So, if you want to apply the changes, you have done in a library into a project,  you have to :

- Open the project (board and schematic),

- In the control panel, browse and found your library, and proceed a right click on the name of your library, then select "Update'.

I hope it helps...

Guillaume.

Thank you for the reply Guillaume.

I am aware that the project stores the library item . I have opened a new project and on the empty schematic page, added my relay and tried all sorts of ways to alter the "pad" name as I now know it has thanks to your thread.

I have now been able to alter the numbers, why is it that a number that appears in the schematic is only changeable on the package page?

The schematic I am trying to produce is very well populated and being able to smash each component and move the names and values around each component is very useful.

Is there any way of moving the pad name about in the same way?

hi,

why is it that a number that appears in the schematic is only changeable on the package page

The "pad" name is changed in the package page because the pad name is related to the package only:

For an example, you have a library with 2 logic devices, first one is a quad 2 inputs OR gates (74HCT32) and second one is a dual D flip-flop (74HC74). Each device have is own symbol, but both have the same package (SOIC-14). So in your library you have 2 devices, 2 symbols and only 1 package that used by the 2 devices.

In the first device, the pad named '1' of the package is connected to the pin A in the symbol of the first gate (one of the 2 inputs)

In the first device, the pad named '1' of the package is connected to the pin named !R in the symbol of the first flip-flop (reset input).

As you can see the 'pad name' is related to the package, and have nothing to do with the symbols.

When you create a package you have to forget the symbol, because a package can be use by very different devices.

And for the symbol the same applies too : often a same component exist in several packages. and a pin !R of your symbol may be connected to the pad '1' in the "DIL" package version, but connected to pad '16' in the QFN package version.

Even if the pad name is not link to the symbol, it's common to show it on the schematic, because it's easier when you need to debug your board

Is there any way of moving the pad name about in the same way?

I don't think so, That's a limitation of Eagle....

Well I suppose I will have to live with that then.

I appreciate the help and clearing up a few things for me. Thank you.

You're welcome.

I'm glad that I could help

I am now trying to go back to what I did when I asked this question.

I found my relay coil but there is an error with it, it shows a number three in the middle of the coil box that shouldn't be there.

I want to go back to the original relay and replace the pad numbers again in the package.

Unfortunately I can't remember how to get back to the page that lets me edit pad names.

Can anyone help me?

I want to put the relay LY40 from the relay library into the package edit page and alter numbers of the pads, where is the package edit page?

Thanks.

I have found it. On the schematic page go to library/open,  scroll down to the library you want, in my case relay.lbr, You get three columns   Device, Package and Symbol. in my case scroll down the package column to LY40. Right click on the pads and choose properties, alter the name, save the project. It might say 'need to alter' something else, allow this.