Mail Archives: geda-user/2017/09/12/11:51:00
Barry Jackson (zen25000 AT zen DOT co DOT uk) [via geda-user AT delorie DOT com] wrote:
> On 12/09/17 13:51, Stephan Böttcher wrote:
>> "Barry Jackson (zen25000 AT zen DOT co DOT uk) [via geda-user AT delorie DOT com]"
>> <geda-user AT delorie DOT com> writes:
>>
>>> I have created BPX85.sym and BPX85.fp for a narrow DIL package that
>>> holds 5 two terminal photo-transistors for which I used slotting.
>>> I guess it would be a DIL10-200 (if there is such an item)
>>>
>>> I adopted the conventional pin numbering for a DIL package but
>>> slotting fails as the pins for each internal device are not
>>> sequential, but across the package.
>>>
>>> The slotdefs are:
>>> 1:1,10
>>> 2:2,9
>>> 3:3,8
>>> 4:4,7
>>> 5:5,6
>>>
>>> Pins 1..5 are slotted correctly, however pins 6..10 are ignored and
>>> left at the default of 10 as in the symbol.
>>>
>>> I spoke to agaran on irc #geda who suggested that this is a bug in
>>> gschem.
>>>
>>> I am attaching the symbol and footprint files in the hope that these
>>> will assist in debugging.
>>>
>>> Thanks
>>> Barry
>>>
>>> v 20130925 2
>>> L 600 800 600 200 3 0 0 0 -1 -1
>>> L 900 800 600 500 3 0 0 0 -1 -1
>>> L 600 500 900 200 3 0 0 0 -1 -1
>>> L 800 400 900 200 3 0 0 0 -1 -1
>>> L 700 300 900 200 3 0 0 0 -1 -1
>>> L 300 600 500 600 3 0 0 0 -1 -1
>>> L 300 400 500 400 3 0 0 0 -1 -1
>>> L 400 700 500 600 3 0 0 0 -1 -1
>>> L 400 500 500 600 3 0 0 0 -1 -1
>>> L 400 500 500 400 3 0 0 0 -1 -1
>>> L 500 400 400 300 3 0 0 0 -1 -1
>>> P 900 0 900 200 1 0 0
>>> {
>>> T 1000 -200 5 10 0 1 0 0 1
>>> pinseq=1
>>> T 1000 -400 5 10 0 1 0 0 1
>>> pintype=oe
>>> T 600 0 5 10 1 1 0 0 1
>>> pinnumber=1
>>> T 1000 0 5 10 1 1 0 0 1
>>> pinlabel=e
>>> }
>>> T 100 1600 8 10 0 1 0 0 1
>>> device=BPX85
>>> T 200 -200 8 10 0 1 0 0 1
>>> refdes=Q?
>>> T 0 500 8 10 0 1 0 0 1
>>> numslots=5
>>> T 500 100 8 10 0 1 0 0 1
>>> slotdef=1:1,10
>>> T 500 -200 8 10 0 1 0 0 1
>>> slotdef=2:2,9
>>> T 600 295 8 10 0 1 0 0 1
>>> slotdef=3:3,8
>>> T 600 95 8 10 0 1 0 0 1
>>> slotdef=4:4,7
>>> T 600 -105 8 10 0 1 0 0 1
>>> slotdef=5:5,6
>>> T 255 300 8 10 0 1 0 0 1
>>> description=opto transistor array
>>> T 1200 600 8 10 0 1 0 0 1
>>> slot=1
>>> P 900 1000 900 800 1 0 0
>>> {
>>> T 900 1000 5 10 0 1 0 0 1
>>> pintype=oc
>>> T 955 1000 5 10 1 1 180 6 1
>>> pinlabel=c
>>> T 805 1050 5 10 1 1 180 0 1
>>> pinnumber=10
>>> T 900 1000 5 10 0 1 0 0 1
>>> pinseq=10
>>
>> pinseq=2
>>
>>> }
>>> T 300 -5 8 10 0 1 0 0 1
>>> footprint=BPX85.fp
>>>
>>
>
> Thanks for your reply, but why?
>
> I have read all the docs I can find and yet pinseq seems to be poorly
> documented.
> An understandable explanation would be much appreciated, as I have
> spent the last two days trying to resolve this.
>
> Barry
>
>
Hi Barry,
Thanks for sharing the symbol and footprint ... much appreciated.
The second pin defined in the slot could be pinseq=2 ... pinseq --> pin
sequence = 2.
Have a look at the section "Symbol Requirements" at
http://wiki.geda-project.org/geda:gschem_symbol_creation
Another thing: looking at the Osram datasheet I see pins with a
rectangular sectional area of 0.5 mm by 0.15 mm (least) varying to 0.7
mm by 0.25 mm (most), depending on the use of the under side of the
package as a mounting surface.
This would require a drill size of 29.26 mil ... round up at 30 mil ...
and add 2 mil to be on the safe side when pin pitch varies and/or pins
are misaligned in the package (bended pins ... YMMV) giving a drill size
of 32 mil.
In your footprint I see drill holes of 20 mill, either way too small.
Caveat: post drill the plated through holes into unplated through holes,
and solder on top layer as well ;-)
One could do a "Least" and a "Most" variant of the footprint for both
use cases.
Just my EUR 0.02
Kind regards,
Bert Timmerman.
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