Hi all,



I am currently designing a new project using the relatively new MCU, the AVR64DD32. I found that the DB version has the same pinout, and we have symbol for it.

The REST/PF6 pin marked bidirectional, however the datasheet (and the real device) states as input only. Is it wise and mark that pin input only, so ERC can detect if that net is not driven?


Thanks,
Lev

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W:

Hi,

Is my understanding of the reach of net labels correct?

A "net label" is only recognized on the same hierachical sheet, but not in sub-sheets.
Different hierachical sheets can use the same net label without creating a sheet to sheet connection.

A "global label" is recognized throughout the entire schematic on all hierachical sheets.
Good for sheet to sheet connection.

Here is my question:

Is there a means to define a net that is valid in a hierarchical sheet and all its sub-sheets, but not in other hierarchical sheets?
This would be useful if several identical complex blocks need to be designed.

Thanks, Tom

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I have converted the user.hotkeys file to a fairly readable Excel book with seven sheets, but I don't see any Upload button on the Files page. Please advise.

In KiCad 7 and 8, they are at C:\Users\[user]\AppData\Roaming\kicad\X.0\user.hotkeys, but the texts are barely readable by humans.

On 2024-05-23 14:08, Tony Casey wrote:

For the hotkeys, find where the KiCad configuration files are stored. I guess on Windows, it would be somewhere close to:

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John Woodgate, Rayleigh, Essex UK
Keep trying

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Yes, I do too. I use Subversion, but version control systems usually require manual updates and commits. But I also have automated backup that runs every evening at about 21:00. Windows users also have the option of easy use of backing up on OneDrive. Most MS Office subscriptions give you 2TB of OneDrive storage. Other cloud options are available...

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Most printer drivers will let you grow or shrink to fit the paper available. Obviously, it wouldn't be much use shrinking an A0 drawing onto an A4 sheet, but A3 -> A4 is usually fine.

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Don't forget that KiCad can sort the numbering of the RefDes in vertical or horizontal sequence. If you require a particular numbering pattern, best do it manually from the start.

Many of my schematics are multi-page, and I've always prefixed the RefDes with the sheet number, so I can immediately check the correct schematic page when tracing a component from the PCB. Thus all resistors on sheet1 start from R100, for example. KiCad can do that automatically too.

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On 23/05/2024 17:16, John Hudak wrote:

Sorry to hear about the problem.? Does ctrl-Z work to undo things? (been a while since I actively used kicad.

With all due respect, shame on Kicad for the lame behavior and poor excuse.? IMHO, backup provided by the tool should be solid - there are no excuses.? No guarantee that doing your own backup would prevent the problem...If they are blaming the behavior on 'things going on in the background' then you could save an already corrupted file.? This shows a lack of discipline on the backup mechanism.

I think it's maybe premature to blame KiCad for this. I've never noticed corrupted backup files. But then I don't routinely use Windows, which has a habit of doing updates and reboots in the middle of the night when it thinks no one is watching. To be fair, John says he forgot to save the file before retiring for the night.

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Thanks. I will look at that, but I do need to print out on A4.

If you can use any size sheet, you can change it… File>Page Settings

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I have a switch that fits the footprint. I now have? a schematic symbol that will do, although it's not quite correct.

Thanks to all for help.

I think you need start with finding a real switch. Then compare datasheet with footprint.
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Kind regards,
Victor

I think you need start with finding a real switch. Then compare datasheet with footprint.
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Kind regards,
Victor

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Thanks, Andy. That's what I did, eventually.

Place all units does work, but you have to be a little careful to avoid
"clickitis" :-)

in the circuit editor
add symbol

select switch / SW_DP3T

(here you can select either the entire unit, or each part, select the
entire unit SW_DP3T)

At the bottom of the selection window ensure that the place all units is
selected.

The next bit is where I think you might be going wrong

Select OK

the system is now ready to place the units. It will ONLY place one unit
at a time, not all in one go.

So move to where you want to place the first unit and click ONCE 

Move to where you want the second unit and click ONCE

For a two unit symbol such as this that's it all done, but if it was a
4,6,8 or whatever part unit you would need to repeat the placements
until all done.

Andy


On Thu, 23 May 2024 14:12:07 +0100
"John Woodgate" <jmw@...> wrote:

Yes, it does work, but 'Place all units' doesn't work. I had to find a 
work-around to get both poles into the schematic.

On 2024-05-23 10:24, Andy wrote:

SW_DP3T looks something like what you are asking form it's in the switch
lib.

Get used to making your own footprints and symbols it's one of the most
useful things you can do as it's a great time saver.

The way to go is find a symbol (or footprint) that's close, copy it,
rename and save in your own libs which you should be doing anyway, and
it's not a good idea to use the provided libs directly as you have no way
of knowing if an update has changed something. It's should not, bit it
can happen.

Andy



On Thu, 23 May 2024 09:53:09 +0100
"John Woodgate"<jmw@...>  wrote:
 

I want to use a double-pole switch with centre-off position, and the
footprint:
Button_Switch_THT:SW_Push_2P2T_Vertical_E-Switch_800UDP8P1A1M6 is good.
But I can't find? a schematic symbol for it, only SPDT_MSM for a
single-pole version. Do I have to make a new symbol for it? That means
delving into the 'user libraries' process, which I find very confusing.

Actually, I am using only one pole, but that switch fits mechanically
very well and I have a supply.

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Best wishes
John Woodgate, Rayleigh, Essex UK
Keep trying

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Keep trying

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So I found out. The hard way. Actually, my schematic is too wide for a single width of the drawing sheet, so I've had to wrap it into two rows, and the renumbering doesn't cope with that. Still, that is what learning is about. Such schematics should be numbered manually, or, once a year (That'll sort the old 'uns from the youngsters. Think 'toothbrush').

If you renumber everything then yes that will mess things up.

Why did you renumber?

There are various options the one you want is don't renumber anything
that is already there, just new things.

If you renumber everything then yes that will mess things up.

I don't know of any way to recover from such a mess

Rule 1 ALWAYS backup a project when making a major change. Is the best
you can say

Andy





On Thu, 23 May 2024 13:34:04 +0100
"John Woodgate" <jmw@...> wrote:

I asked KiCad to renumber the components on the schematic. What I didn't
realise is that it turns the PCB into a disaster area, because many of
the components are then in the wrong places, with wrong connections. Is
there a way to recover from this, or do I have to delete all the
components and tracks and start again?? Is there a way to prevent the
disaster, other than not renumbering?

I have another question: is there a way of printing the list of keyboard
shortcuts? Since it is an HTML page in the on-line manual, I can't see
how to do it.

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Keep trying

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Place all units does work, but you have to be a little careful to avoid
"clickitis" :-)

in the circuit editor
add symbol

select switch / SW_DP3T

(here you can select either the entire unit, or each part, select the
entire unit SW_DP3T)

At the bottom of the selection window ensure that the place all units is
selected.

The next bit is where I think you might be going wrong

Select OK

the system is now ready to place the units. It will ONLY place one unit
at a time, not all in one go.

So move to where you want to place the first unit and click ONCE

Move to where you want the second unit and click ONCE

For a two unit symbol such as this that's it all done, but if it was a
4,6,8 or whatever part unit you would need to repeat the placements
until all done.

Andy


On Thu, 23 May 2024 14:12:07 +0100
"John Woodgate" <jmw@...> wrote:

Yes, it does work, but 'Place all units' doesn't work. I had to find a
work-around to get both poles into the schematic.

On 2024-05-23 10:24, Andy wrote:

SW_DP3T looks something like what you are asking form it's in the switch
lib.

Get used to making your own footprints and symbols it's one of the most
useful things you can do as it's a great time saver.

The way to go is find a symbol (or footprint) that's close, copy it,
rename and save in your own libs which you should be doing anyway, and
it's not a good idea to use the provided libs directly as you have no way
of knowing if an update has changed something. It's should not, bit it
can happen.

Andy



On Thu, 23 May 2024 09:53:09 +0100
"John Woodgate"<jmw@...> wrote:

I want to use a double-pole switch with centre-off position, and the
footprint:
Button_Switch_THT:SW_Push_2P2T_Vertical_E-Switch_800UDP8P1A1M6 is good.
But I can't find? a schematic symbol for it, only SPDT_MSM for a
single-pole version. Do I have to make a new symbol for it? That means
delving into the 'user libraries' process, which I find very confusing.

Actually, I am using only one pole, but that switch fits mechanically
very well and I have a supply.

--
Signature OOO - Own Opinions Only
Best wishes
John Woodgate, Rayleigh, Essex UK
Keep trying

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Best wishes
John Woodgate, Rayleigh, Essex UK
Keep trying

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Thanks, Robert, but I've already started again.

In the "Update PCB from schematic" tool in version 7, IIRC you just have
to *not* select "Re-link footprints to schematic symbols based on their
reference designators".?? If that doesn't work, you can also go around
all the components on the PCB manually giving each one the correct
designation, and then update the PCB with that box *selected*.?? I know
the latter works, because I partially did this last week (for completely
different reasons).

Regards,

Robert

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No, Tony, I wouldn't dream of it. But I just forgot to save the schematic before going to bed at 0030.

You don't want to get me started about <users> making backups of anything valuable, do you?? ;-)? I think we've had that conversation before.

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Regards,
Tony

On 23/05/2024 15:43, John Woodgate wrote:

Unfortunately, the backup I need is corrupted (KiCad apology message received) , due to having KiCad running while some other updates were going on. It looks like I have to start all over again.

On 2024-05-23 14:08, Tony Casey wrote:

Fortunately, KiCad saves backups. Look in your PCB project directory. You should have a folder of zips called "<Project_name>-backups".