Added a set of common generic relays

[osholt]

I added generic relays to device library of the following popular configurations:
Relay_DPDT

Relay_DPST_NC

Relay_DPST_NO

Relay_SPDT

Relay_SPST_NC

Relay_SPST_NO

All symbols are consistent with the fully specified relays used in the relays library. Generic relays encounter similar problems to generic op amps regarding pin numbering: every package and every manufacturer uses different conventions. I picked a simple convention to follow in line with generic op amps.

All symbols were tested with the checklib.py script and comply with all KLC guidelines applicable to generic parts.

I have not included any latching relays but I (or someone else) may do this in the future.

As this is a generic library contribution I have not included any specific datasheet or footprint information.

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[myfreescalewebpage]

@osholt thanks for this contribution.
However, I'm not sure it's really wanted because you are showing a specific configuration of pins and all relays do not have the same pin assignment. @evanshultz your point of view ? Maybe something we should define with generic pin name ?
Joel

[osholt]

@osholt thanks for this contribution.
However, I'm not sure it's really wanted because you are showing a specific configuration of pins and all relays do not have the same pin assignment. @evanshultz your point of view ? Maybe something we should define with generic pin name ?
Joel

Thanks for taking the time to review! I am happy to call the pins whatever works.

The precedent for transistors of including every pin permutation I did not think was appropriate as relay pin allocations are far from standardised between packages or manufacturers but the functions are highly standardised.

I created them because I was frustrated by a lack of generic relays to include in the design stage before having to commit to a specific part.

There are certainly other generic parts that struggle from the same "generic function but no generic pin number problem" and I am not sure how they have been handled: coupled inductors, multi-tap transformers and and generic op-amps come to mind.

Oliver

[myfreescalewebpage]

@chschlue also maybe your point of vieww (my comment at #2787 (comment))

[chschlue]

I'm generally in favor of the numbering suggested in #2705 (comment), but I'm not quite sure if that's understood internationally, especially across the pond.
@evanshultz?

[myfreescalewebpage]

I agree