The only way to tell if a footprint is "correct&= quot; is to measure the part you intend to install in it, and compare those= dimensions against those of the footprint. Every footprint in the library = is correct for some version of some part that was produced. You can general= ly trust that a SOIC-8 part will fit on any version of a SOIC-8 footprint. = However, the footprint designer may have had reflow soldering in mind, and = made the pads only slightly larger than the pins, whereas you may have hand= -soldering in mind and will want larger pads that are easier to work with.<= br>

ECAD libraries of parts generally fall into tw= o categories, "light" and "heavy". We favor the light k= ind. In this kind of library, generally, symbols are not associated with fo= otprints, and that association is something that the designer has to do. Th= is allows you to use the same symbol for a part that might have multiple pa= ckages. For example, you can buy a 741 opamp in DIP packages, SOIC packages= , TSSOP, VDFN... It's exactly the same from an electrical perspective, = only the physical realization is different. With a light symbol, you use th= e same symbol to represent all of these. Then you don't have to make th= e choice about what package to use until you're ready to start designin= g the PCB.

There are also many symbols that a= re generic enough that they can refer to any of a number of components. The= op-amp symbol can refer to the LM741, LMV321, TL971, and a slew of others.= Similarly, the resistor, capacitor, and inductor symbols can refer to any = of a near infinite number of specific parts. That means you don't have = to generate a new symbol for a 210 ohm resistor, 220 ohm resistor, 221 ohm,= 226 ohm... etc.

In a heavy library, you do as= sociate symbols with footprints. That means that you're deciding which = package to use when you put down the symbol on the schematic. You may or ma= y not be ready to do that when you're still designing the electrical ci= rcuits. It also means that now you need to have a symbol for each of the di= fferent packaging options (741 in a DIP-8, 741 in a SOIC-8, 741 in a TSSOP-= 8...). So, now we would end up with 10 symbols for the 741 op-amp that were= all identical, but with different footprint properties.

The other issue with heavy symbols that can crop up if you're no= t careful is if the footprint were to change. Perhaps you make a special ve= rsion of a SOIC-8 that has a heat sink pad underneath it for a part. Then m= aybe a year later you copy that project to use a template for a new project= . In the new project you want the original footprint, but the way your path= s are set up, you unintentionally pick up the modified one from your previo= us project.

That said, there are some parts in the= libraries that have unique footprints. In those instances, you may see the= footprint attached to the symbol.

--Chad

On Sat, Aug 10, 2019 at 8:09 AM Torben Friis (friistf AT gmail DOT com) [via geda-help AT delorie DOT com] <= geda-help AT delorie DOT com> wrote:

Hi Chad Parker,
I am looking for 5 pin inline with a distance of 2.54= mm - the sym and fp file. I can find some fp files (jumpers) that I can us= e, but are they correct? How come sym file entries and fp file entries dont= come in pairs?
best regards
torben

On Thu, Aug 8, 2019 at 6:07 PM Torben Friis <friistf AT gmail DOT com> w= rote:
Hi Chad Parker
That was= wonderfully clear - thank you very much. I have found pcb.pdf.
best regards
torben
On Wed, A= ug 7, 2019 at 9:02 PM Chad Parker (parker DOT charles AT gmail DOT com) [via geda-help AT delorie DOT com] <geda-help AT delorie DOT c= om> wrote:
The <alt>-s collision with settings menu has = been resolved in master and will be available at the next release.

To change the size of the drill holes for pins, select all= of the pins you want to change by clicking them so that they turn blue. Th= en you can use the command :ChangeHoleSize(SelectedPins, +1, mm). Note, tha= t this will fail if the final hole diameter is larger than the copper pad, = so, you may need to increase the size of the pad first.

=
Also note that any dimension that starts with a "+" or= "-" is considered to be a delta relative to the current dimensio= n. So, for example, if your hole diameter is 0.5 mm, and you executed :Chan= geHoleSize(SelectedPins, +1, mm), then your hole will increase to 1.5 mm. H= owever, if you execute :ChangeHoleSize(SelectedPins, 1, mm), then the hole = size will become 1 mm.

If using the GTK HID, y= ou can get a list of the current key-bindings by looking in the "Info&= quot; menu.

gEDA comprises many programs. Each ind= ividual program (should) have its own user's manual. pcb does, and it s= hould ship with pcb. Search for the file "pcb.pdf" on your filesy= stem. It's probably in /usr/share/doc/pcb or /usr/local/share/doc/pcb.<= /div>

--Chad

On Wed, Aug 7, 2019 at 10:58 AM To= rben Friis (friistf@= gmail.com) [via geda-help AT delorie DOT com] <geda-help AT delorie DOT com> wrote:
Hi Glen,
Apparently I cant use PCB, but have to us= e PCB-GTK. When I do I get:

From http://wiki.geda-project.org/geda:pcb-quick_reference:
Alt+S sizehole increase the hole of the objec= t under the cursor
Alt+Shift+S sizehole (-) decrease the hole of the o= bject under the cursor
Ctrl+S sizehole increase the hole of the object= under the cursor
Ctrl+Shift+S sizehole (-) decrease the hole size
=
Alt+s gives me Settings, Ctl+s gives me nothing

:ChangeSize(Sele= ctedPins,+1,mm) gives me nothing

There a lots of tutorials, but is'nt there an authoritative = manual for geda?
torben

On Wed, Aug 7, 2019 at 3:01 PM Glen W. Ruch (gw DOT ruch AT yahoo DOT com) [via geda-help AT delorie DOT c= om] <geda= -help AT delorie DOT com> wrote:
=20 =20 =20

Torben:

I typically accept the defaults.?? Since I usually only manually drill PCBs, I generally do not pay too much attention.

I use pcb, and if your pcb-gtk is using the same user input, hovering the cursor over the hole and pressing just s should increase the size of the annular copper ring.?? (Seemingly without altering the hole diameter)?? Pressing just k will adjust the klear= ance (sic)

You might find the YouTube video: https://www.youtube.com/watch?v= =3Ds6O817_G9VE interesting as he alters the sizes of vias, and I can do the same with DIP socket pins.

Hope this helps.

On 8/7/19 6:18 AM, Torben Friis (friistf AT gmail DOT com) [via geda-help AT delorie DOT com]= wrote:

=20

Hi Glen,

Anyway, it works.

I am trying to change drill size for a pin in PCB. I have tried :ChangeSize(SelectedPins, +2000) (how do I select a pin?) and Alt+s while I place the crossed lines on a pin, but nothing changes.

If I succeed in changing the?? drill size (which by the way is called drill width), will the other dimensions (annular, etc) stay unchanged)?

best regards

torben

On Mon, Aug 5, 2019 at 1:38 P= M Glen W. Ruch (gw DOT ruch AT yahoo DOT com) [via geda-help AT delorie DOT com] <ge= da-help AT delorie DOT com> wrote:

Torben:

I am not seeing the issue.?? Probably because I did not receive Saturday's message with the attachment.

At this point I cannot tell if you are installing from your distro's repositories or cloning the github for loca= l compiling.

If compiling locally, there are quite a number of -devel files that must be installed from your distro's repositor= y before you can start the build process.

Hope this helps

On 8/5/19 5:43 AM, Torben Friis (friistf AT gmail DOT com) [via geda-help@= delorie.com] wrote:

Hi Erich and Glen,

I have run the geda:gsch2pcb_tutorial again and I get the same result.
I have installed gtk2.0 (sudo apt-get install gtk2.0) and have packages:

ii ??gtk-update-ico 3.22.30-1ubu amd64 ?? ?? ?? ??icon theme caching utility
ii ??gtk2-engines-m 0.98.2-2ubun amd64 ?? ?? ?? ??cairo-based gtk+-2.0 theme engine
ii ??gtk2-engines-p 2.24.32-1ubu amd64 ?? ?? ?? ??pixbuf-based theme for GTK+ 2.x
ii ??gtk2.0-example 2.24.32-1ubu amd64 ?? ?? ?? ??example files for GTK+ 2.0

and:

ii ??pcb ?? ?? ?? ?? ?? ??1:4.0.2-4 ?? ??all ?? ?? ?? ?? ??printed circuit board (pcb) desig
ii ??pcb-common ?? ?? 1:4.0.2-4 ?? ??all ?? ?? ?? ?? ??printed circuit board (pcb) desig
ii ??pcb-gtk ?? ?? ?? ??1:4.0.2-4 ?? ??amd64 ?? ?? ?? ??printed circuit board (pcb) desig
ii ??pcb-lesstif ?? ??1:4.0.2-4 ?? ??amd64 ?? ?? ?? ??printed circuit board (pcb) desig

The board.pcb file starts:

torben AT torben-Aspire-E5-773G:~/gaf/myproject1$ cat board.pcb
# release: pcb 1.99x
# To read pcb files, the pcb version (or the cvs source date) must be >=3D the file version
FileVersion[20070407]
PCB["" 600000 500000]
Grid[10000.000000 0 0 0]
Cursor[0 0 0.000000]
PolyArea[200000000.000000]
Thermal[0.500000]
DRC[1000 1000 1000 1000 1500 1000]
Flags("nameonpcb,uniquename,clearnew,snappin")<= br> Groups("1,c:2:3:4:5:6,s:7:8")
Styles["Signal,1000,3600,2000,1000:Power,2500,6000,3500,1000:Fat,4000,= 6000,3500,1000:Skinny,600,2402,1181,600"]
Element(0x00 "TO92" "Q201" "2N39= 04" 0 0 0 100 0x00)
(
Pin(250 200 72 42 "1" 0x101)
.
.
.

Can you see anything wrong?
It's a real mystery.
best regards
torben

On Sat, Aug 3, 2019 a= t 4:46 PM Torben Friis <friistf AT gmail DOT com> wrote:

Hi Erich and Glen,

I have started from scratch (uninstalling - installing gEDA,?? restarting the computer.) without using sudo and I have installed gtk (sudo apt install gtk+3.0) and the result is shown in the attached screen dump.

Same result, but there is something about gtk that I may have misunderstood.

best regards

torben

On Fri, Aug 2, 2019 at 8:07 AM Glen W. Ruch (gw DOT ruch AT yahoo DOT com) [via geda-help AT delorie DOT com] <geda-help AT delorie DOT com> wrote:

P.S.
You may also want to do a ls -l (list -long) to see how many files still belong to you and how many belong to root.

You may want to sudo chown to move the files back to the correct owner.

On my computer there is a difference between the user default permissions and root's default permissions.?? You may want to correct the permissions with sudo chmod

Regards.

On 8/1/19 4:34 PM, Glen W. Ruch (gw.ruch@= yahoo.com) [via geda-help AT delorie DOT com] wrote:

Torben:

You should not have to use sudo (SuperUser DO) as this elevates you from your user level (torben) to root user.

This may be causing issues where you are saving files as user torben, but when you become root, root's directory may be checked for the file.

sudo is a dangerous tool and is meant to be used for specific uses such as installing software.?? Using it excessively can cause a typo to have catastrophic consequences.?? When your computer is configured correctly you should be able to run gschem or pcb (etc.) with your own user (torben) level privileges.

Hope this helps.

On 7/30/19 7:11 AM, Torben Friis (friis= tf AT gmail DOT com) [via geda-help AT delorie DOT com] wrote:

Hi,

Is Wilson's tutorial up-to-date? I run:

torben AT torben-Aspire-E5-77= 3G:~/gaf/myproject3$ sudo gsch2pcb project

with 2 resistors and get:

--------------------------= --------
Done processing.?? Work performed:
2 file elements and 0 m4 elements added to board.pcb.

Next step:
1.?? Run pcb on your file board.pcb.
?? ?? You will find all your footprints in a bundle ready for you to place
?? ?? or disperse with "Select -> Disperse all elements" in PCB.

2.?? From within PCB, select "File -&g= t; Load netlist file" and select
?? ?? board.net to load the netlist.

3.?? From within PCB, enter

?? ?? ?? ?? ?? ??:ExecuteFile(board.cmd)
?? ?? to propagate the pin names of all footprints to the layout.

I then run:
torben AT torben-Aspire-E5-773G:~/gaf/myproject3$ sudo pcb board.pcb

and get:

File 'board.pcb' has no font information= , using default font

??

I then get the rather empty looking screen shown attached.

I can disperse the components and run the netlist, but when I run

sudo :ExecuteFile(board.cmd) (or :ExecuteFile(board.cmd))

??nothing happens

Incidentally, when I run:

sudo gschem one.sch

the curser moves to the next line. It looks as if some input is expected. What?

Can anyone help?

best regards

torben

On Thu, Feb 14, 2019 at 3:04 PM Torben Friis <friistf AT gmail DOT com> wrote:

Hi ,

I have been looking fo the above element, but I cannot find it. I have been looking for .../newlib and found it in two places, but neither one appeared to provide it.

Is there anywhere else I can look for it?

torben