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OK, I checked into the cart failure on the parallel port. Today I had a solid failure of bit four. See attachment. When I connected to the chip directly it looked better but not right. Investigation showed no connection on pin 9 of the 2149. So I just jumped it an the world is good. Parallel port always passes now.
Great work PaulJ.PaulJ wrote: 20 Oct 2018 19:42OK, I checked into the cart failure on the parallel port. Today I had a solid failure of bit four. See attachment. When I connected to the chip directly it looked better but not right. Investigation showed no connection on pin 9 of the 2149. So I just jumped it an the world is good. Parallel port always passes now.
First attachment: with jump parallel connector pin 6 jumper to 2149 pin 9
Second pic: sampled at pin 9 2149
Third: As build no jumpers, doesn't work.
Fourth: Results with atcha_1: works 100% now.
Everyone should check parallel port pin 6 to 2149 pin 9 with an ohm meter. If open jumper. I haven't checked the pc board layout images yet.
What really pi**es me off with eagle is it always defaults the grid to 2.54 rather than saving the grid I last used in the file. So every time I open eagle, or the lib editor etc, I have to change the grid every time. I can end up doing it like 50 times a week. So then the nets don't snap to the pad and sometimes I forget to change it or so tired I just don't notice the snap is off :roll:Forgottenmyname wrote: 20 Oct 2018 20:41 Ah, that explains it then. It's one of my most common cock ups when I use Eagle too.
I think I have used 7.7 on windows and that doesn't save the grid :( got annoyed with eagle when they changed the icons, was some hacks to put back a similar old set.. But got sick of them messing with it all. Companies never seem to have anything better to do than change icons about :roll: they even moved some icons, like same location for years and they suddenly decide to move a few about.. Whyyyyy ??? I don't wanna go looking for icons, it should be where its always been and look like it always been, not spend 10mins trying to figure out what icon now does what each click :roll:rpineau wrote: 21 Oct 2018 01:24 My version save the grid used in a schematics (7.7 on OS X).
but yea older version had that issue that was annoying.