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Questions tagged [pads]

PADS is a CAD PCB editor produced by Mentor Graphics

4
votes
1answer
1k views

How to connect same signal pads in Package Editor in Eagle?

So, I'm trying to make a circular pad for a project: To try to make my life easier when changing inner and outer diameters I created a package which consists of 2 pads: one horizontal, which connects ...
3
votes
1answer
637 views

Eagle CAD pins with same function

I would like to design a tactile switch footprint, where there are clearly two pads and two pins on each side of the switch, but let eagle cad's router know that it can route to either pair of pins. I ...
13
votes
1answer
2k views

Using a via to strengthen surface mount connector on or near pad

I am trying to design a board that has a surface mount connector. I was shown a picture of an example board that has vias on the pads of the connector. I don't believe the via is for connecting to a ...
9
votes
3answers
4k views

Using oblong / rounded surface mounted pads for chip resistors, capacitors and inductors

I'm learning to layout PCBs and lately I came across practice that made me curious. The chip passives' pads are etched with oblong / rounded shape, instead of rectangular shape that is used in all ...
8
votes
4answers
1k views

Square vs Round pad

I'm curious why PCBs have one square pad in row for 0.1" headers. What is purpose of putting one square pad? What it indicates? Can you push more amps through square pad than round?
5
votes
2answers
784 views

Size of SMD pads for components with high tolerances

I'm building an Eagle component for an LSM115J. The connectors on this part have fairly large tolerances (1.85-2.21mm width, 0.76-1.52mm length). There is no recommended land pattern. Should I go ...
1
vote
4answers
2k views

Standard package footprints

I'm looking for footprint's dimmensions for the standar packages like 0402, 0603, 0805 etc. I did a quick search on the google and I got many different results and I got confused. Is there something ...
0
votes
1answer
288 views

Repair (fixing back) lifted power thru hole pad+trace

Attached pictures are a lifted power pad+trace of a 1000W PSU of a commercial subwoofer. Caliper showed 0.42mm thick, which if correct gives about 12oz copper trace! In this particular pad was the ...
0
votes
0answers
45 views

THT decopling capacitor spacing from the TQFP uC's power pin

simple question - how close can the uC's power pin (TQFP pad) and a ceramic cap's PTH pin can get so the PCB fabrication process or later exploitation would not go wrong ? Some ballpark figures for ...