Re: [Jmri-developers] New single output signal

[Bob J. <Bob...@lb...>]

On Jan 15, 2010, at 4:16 PM, Kevin Dickerson wrote:

> Bob Jacobsen wrote:
>> I'm having a little trouble understanding the premise of this.
>>
>> When you create one of these, there are two selection boxes:
>>
>>   On Appearance:
>>
>>   Off Appearance:
>>
>> You get to select _one_ of Dark, Red, Lunar, Flashing Red, etc for
>> _each_ of these.  (I assume On is Thrown and Off is Closed)
>
> Yes, Off is Closed, On is Thrown.


I think it would be good to use Closed and Thrown for labels then, so  
people know.  On, and particularly Off, bring to much such different  
things....

>> What does choosing both of them mean?  If I pick Red for On, and  
>> Green
>> for Off, and somebody sets Dark, what does it do?
>
> What this allows for, is the ability to drive two LED's off of one
> output, eg when power is applied you get Green, when it is off you  
> get Red.

Neat idea!  So (with appropriate wiring, etc) you can get e.g. a green/ 
yellow dwarf from just one output.  Now I see the need for specifying  
the two colors separately, thanks.

It might be good to add an explanation of that use to e.g.

  help/en/html/tools/signaling/index.shtml:
  help/en/package/jmri/jmrit/beantable/SignalAddEdit.shtml

I certainly wouldn't have thought of it, and it makes the feature  
really useful.

Bob
--
Bob Jacobsen, LBNL
Bob...@lb... +1-510-486-7355 fax +1-510-643-8497 AIM, Skype  
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