Problems with diode, lm337 and opamp symbols

Bug #911692 reported by Erik Keever
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
gEDA
New
Undecided
Unassigned

Bug Description

There are two diode symbols in geda with opposite directions, however they mark the same pins as anode/cathode; Revised diode-3.sym is attached.

The LM337 negative regulator symbol assumes the same pinout as LM317 positive regulator; Correct lm337-1.sym is pasted due to there being only 1 attachment.

opamp-1.sym and opamp-2.sym both have no pins assigned beyond the default numbering 1-5. If aop-std is supposed to be the single opamp, it should be so marked; If they are to stay, they should be indicated as not being the amp-on-board symbols. In all cases, the positive and negative power rails are _not_ marked, which is treachery waiting to happen if someone flips the symbol to have - on top as is common for negative gain circuits.

v 20100214 2
B 300 300 1400 1000 3 0 0 0 -1 -1 0 -1 -1 -1 -1 -1
P 300 800 0 800 1 0 1
{
T 100 800 5 10 0 0 0 0 1
pinnumber=2
T 100 900 5 10 1 1 0 0 1
pinseq=2
T 600 700 9 10 1 1 0 6 1
pinlabel=Vin
}
P 2000 800 1700 800 1 0 0
{
T 1900 900 5 10 1 1 0 6 1
pinnumber=3
T 1900 700 5 10 0 0 0 0 1
pinseq=3
T 1300 700 9 10 1 1 0 0 1
pinlabel=Vout
}
P 1000 0 1000 300 1 0 0
{
T 1100 100 5 10 1 1 0 0 1
pinnumber=1
T 200 100 5 10 0 0 0 0 1
pinseq=1
T 1000 400 9 10 1 1 0 3 1
pinlabel=Adjust
}
T 300 1400 9 10 1 0 0 0 1
LM337
T 300 1700 8 10 0 0 0 0 1
device=LM337
T 1700 1400 8 10 1 1 0 6 1
refdes=U?

Tags: symbols
Revision history for this message
Erik Keever (ekeever1) wrote :
Peter TB Brett (peter-b)
tags: added: symbols
Revision history for this message
Lawrence Hallman (m1cr0macr0) wrote :

In the directory file:///usr/share/gEDA/sym/diode/:

diode-1.sym (Cathode =pin 2)
diode-2.sym (Cathode =pin 2)
diode-3.sym (Cathode =pin 1)

After some searching, I found that some mfg's mark the Anode as Pin 1 but in many others, it the Cathode
In PCB, the footprint diode_lay 300.fp marks the cathode as pin 1. Glad I examined the PCB layout before and caught this before sending a run into production as I am reading in many places that Pin 1 is always Cathode. I can see where diode-1.sym and diode-3.sym are opposites to work around this but perhaps the pins be shown to help avoid confusion for users who may be unaware of these differences.

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