A check for pin type is even more worthless for analog applications.
There are perfectly reasonable and common opamp circuits that connect the
pin 3 (input) directly to pin 6 (output).
---(kaimartin)---
--
Kai-Martin Knaak
http://lilalaser.de/blog
This is OK. We have
On Jun 29, 2008, at 10:17 PM, Larry Doolittle wrote:
On Mon, Jun 30, 2008 at 12:00:48AM -0400, al davis wrote:
On Sunday 29 June 2008, John Doty wrote:
It looks to me that geda has mixed the concepts of
discipline and direction.
Yes, but the real problem is the mixing of such clerical
This is a bug in the library. The symbol pot-1.sym should have all pins
declared as passive instead of input/output.
There should be pintype=pas attribute for each pin instead of pintype=io.
It is probably safe to ignore the warning.
The same bug is in pot2.sym
I am a newbie using PCB. I
On Jun 29, 2008, at 4:49 AM, Wojciech Kazubski wrote:
This is a bug in the library. The symbol pot-1.sym should have all
pins declared as passive instead of input/output.
No, it's a conceptual problem with DRC. It is perfectly reasonable to
consider the pins on a pot as inputs or outputs.
Thanks for the answers.
I ignored the warning, referencing it for completeness. However, you
explained the warning, not the problem I have going from gschem to
pcb. I invoked the commands used by gsch2pcb manually, checking for
where the odd pin numbers were inserted.
gnetlist -g PCB inserts
On Jun 29, 2008, at 4:49 AM, Wojciech Kazubski wrote:
This is a bug in the library. The symbol pot-1.sym should have all
pins declared as passive instead of input/output.
No, it's a conceptual problem with DRC. It is perfectly reasonable to
consider the pins on a pot as inputs or
On Jun 29, 2008, at 12:49 PM, Wojciech Kazubski wrote:
...
The passive pintype is specified for such case and means that
the pin can be connected with anything else without error or warning.
Another variable resistor pot-bourns-1.sym does have all pins
declared as passive.
In the
Why does gnetlist produce pin numbers like 'n1', 'n2', 'n+',
and, 'n-'?
The components are resistor-1.sym and capacitor-1.sym.
Pcb does not like these kind of pin numbers.
tomdean
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I found the problem.
I had gnetman in the component search path.
AARRGHHH!
At least, we had an interesting discussion on drc2
Thanks,
tomdean
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On Sun, 29 Jun 2008 20:49:14 +0200, Wojciech Kazubski wrote:
Agree, DRC check works only for classic digital logic and does not cover
all possible design errors. For example it does not check for two i/o
pins being set as output in the same time. It does not work well for PLD
devices or uC,
On Sunday 29 June 2008, Kai-Martin Knaak wrote:
A check for pin type is even more worthless for analog
applications. There are perfectly reasonable and common
opamp circuits that connect the pin 3 (input) directly to pin
6 (output).
Actually, pin type is important for modern analog design,
On Jun 29, 2008, at 8:38 PM, al davis wrote:
On Sunday 29 June 2008, Kai-Martin Knaak wrote:
A check for pin type is even more worthless for analog
applications. There are perfectly reasonable and common
opamp circuits that connect the pin 3 (input) directly to pin
6 (output).
Actually,
On Sunday 29 June 2008, John Doty wrote:
You're assuming voltage interfaces. Current interfaces turn
that on its head.
No, but
And then there's the trick of grounding an
opamp output and getting output current from the power
pins: this illustrates that the direction and discipline
On Mon, Jun 30, 2008 at 12:00:48AM -0400, al davis wrote:
On Sunday 29 June 2008, John Doty wrote:
It looks to me that geda has mixed the concepts of
discipline and direction.
Yes, but the real problem is the mixing of such clerical
concepts into what is really a set of applied
I am a newbie using PCB. I created a schematic with footprints,
values, etc.
I used gnetlist -g drc2 and had one warning.
WARNING: Pin(s) with pintype 'input/output': R101:3
are connected by net 'GND'
to pin(s) with pintype 'power': U101:7
I used gsch2pcb and then pcb. I
I put the schematic at:
http://www.speakeasy.org/~tomdean/SRS-connect.html
tomdean
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I had tried the tutorial last year and iirc, it worked.
I just retried the tutorial and I get the n1 pin name problem. The
resistors are not connected in the ratsnest.
I am using the port on FreeBSD 7.0, with an up-to-date ports tree.
I tried replacing the default m4 with gm4. No change.
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