Eagle Libraries

Then it just comes down to “whatever works”. I’ve violated design rules, pushed minimum spacing, clearances, modified parts to cram a design onto boards that are too small. Not good to let it become a habit but its just personal boards. We not even suppose to route traces under 7135s.

Uh oh, better watch out, I said that same exact thing once and got schooled up and down!

Though if you get boards from cheap chinese fabs I would inspect the soldermask on traces that run under 7135s or other exposed pads. Oshpark spoils us.

Comes from the different mindset of doing production boards. Violate design rules there and it can really cost you.

Hmm. Let’s try not to get too sanctimonious here.

“Can” is the operative word in Halo…’s statement. Engineering hacks are sprinkled through consumer goods as necessary. High powered flashlights certainly require more of that sort of thing than most.

The design requirements for the Nanjg-105c, for example, force the use of traces under that GND tab.

Could you edit the part and give it and additional pin? Make it a four pin component, having the middle leg as the fourth pin? Then just avoid connect it to anything in the schematics and it should be ok. It could make your schematic look a little ugly with an additional unused pin on the 7135s but it should work.

Note that I haven’t tried this… just brainstorming.

That would definitely work, (as Alex and Halo have pointed out it still wouldnt be technically correct) but make both a TAB and a GND on the symbol, then you could GND them both in the .sch when you initially lay it out and once the board’s finished if you find those remaining air wires you could go back and remove the needed GND from whichever of the 2 pins was giving you that issue from the .sch.

Anybody have an Omten 1217 library to share with me?

It’s not by any means official but I’m trying to figure out how to up load it. I’m digitally challenged so the obvious isn’t. In the end it might take you less time to make your own but his evening is dedicated to omten.

I didn’t totally understand the tutorial on creating my own, and I couldn’t find a data sheet for the 1217.

You can also just take measurements of a switch. Mtn lists the body as 12.40mm x 16.80mm and I believe the tabs are 5mm wide.

Thanks, that’s helpful. I’m still waiting for fasttech to deliver mine or else I’d measure myself.

I just wish I could install Eagle at work so i could do this when I’m bored…. :expressionless:

Anyone have a library part for the mmu size 13A and the LFPAK 33?

They are already in the Element 14 files. You may have to search for the LFPAK33 under its alternate package name.

Thanks.

Oshpark drc puts a 6 mil (.15mm) spacing minimum between same signal vias. Is this a hard limit or can it be fudged? I.E. Can the via pads be almost touching if the drill centers meet the minimum spacing?

As long as the drill holes don’t overlap you can do as you please with the pads.

I believe you will be fine as long as the actual drill holes are not closer than the minimum drill spacing.

Does anybody have an eagle lbr for this type of switch? Dimensions are 3x6x3.5mm.
I’ve looked in Farnell but cannot find any at this time

It was my understanding that the SIR800DP has a slightly different footprint than the LFPAK56, but it worked ok on that footprint. Is this true, or are they actually a perfect fit?

Different footprint, but designed to be compatible (just like LFPAK56 is designed to be compatible with lots of others).

4 front pins are much shorter than on LFPAK56, and the rear section has no exposed pad on top so it is good to extend the LED- pad out a bit more. If you were only going to use PowerPAK SO-8 footprint on a flashlight driver I would shorten the front 4 pins then use the extra space you gained out back.