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Author Topic: Colour Light Signals  (Read 1819 times)

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Online Bealman

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Re: Colour Light Signals
« Reply #30 on: September 28, 2018, 11:08:11 AM »
Actually, I think you're right there.

It would still be cool, though, just knowing it was there and working.
Vision over visibility. Bono, U2.

Offline EastMidsCoal

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Re: Colour Light Signals
« Reply #31 on: September 28, 2018, 02:57:27 PM »
But not at Doncaster as you indicated above. The letters were just an example using two of the three letters you said could be displayed on Platform 4 at Doncaster.

If you get anything near to scale size (3mm * 3mm) it would be very difficult to see any letter shown.

Yes very valid point on both counts.  The reason for the theaters at the north end of Platform 4 (pictured) is I suspect because of the sighting issues caused by the canopy on approach, while for the the adjacent one on the main line is down to speed, so there are exceptions to the rule definitely.

I think any theatre style approach would have to be a little over scale, but interesting to see what can be done!  One thought I've got is seven 0.5mm fibre optic strands bundled together into a 7x7 grid would be 3.5mm x 3.5mm, so only slightly over scale.  Now whether anything meaningful can be deciphered from the light coming through is another issue - but I'll give it a try!

Richard

Offline ntpntpntp

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Re: Colour Light Signals
« Reply #32 on: September 28, 2018, 03:44:22 PM »
One thought I've got is seven 0.5mm fibre optic strands bundled together into a 7x7 grid would be 3.5mm x 3.5mm, so only slightly over scale. 

49 strands!   Good luck  :D
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline njee20

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Re: Colour Light Signals
« Reply #33 on: September 28, 2018, 04:35:40 PM »
As discussed though unless you want every conceivable combination you don't need 49, and 30ish is more likely.

A CR Signals head is just under 5mm wide, so I reckon 6-7mm would look absolutely fine for a theatre box.

Offline acook

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Re: Colour Light Signals
« Reply #34 on: September 29, 2018, 05:57:18 PM »
How about this- first one I found- must be more out there.

https://www.alibaba.com/product-detail/ultra-thin-0-2-inch-5mm_60461360995.html

Alan

Offline ntpntpntp

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Re: Colour Light Signals
« Reply #35 on: September 29, 2018, 07:27:00 PM »
How about this- first one I found- must be more out there.

https://www.alibaba.com/product-detail/ultra-thin-0-2-inch-5mm_60461360995.html

Alan
Nice but it's a standard 7 segment display for displaying digits, rather than a full dot matrix which you'd need for representing a wider range of letters and numbers.
Nick.   2016 celebrating the 20th anniversary of "Königshafen" exhibition layout!

Offline EastMidsCoal

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Re: Colour Light Signals
« Reply #36 on: September 29, 2018, 08:10:28 PM »
It would all depend on what characters you wanted to display.  A,C,E,F,H,I*,J,L,O,P,S,U and 0-9 are all possible.  I is an option for a model, if you were not using numbers.

Online Bealman

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Re: Colour Light Signals
« Reply #37 on: September 29, 2018, 11:25:27 PM »
That is very impressive. Don't know what you'd do with a hundred of 'em, though!!
Vision over visibility. Bono, U2.

Offline acook

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Re: Colour Light Signals
« Reply #38 on: October 02, 2018, 02:29:49 PM »
Normal process is break the other 99 trying to get 1 to work.

Alan

Offline njee20

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Re: Colour Light Signals
« Reply #39 on: October 02, 2018, 08:46:14 PM »
 :pmsign:Yep, which wouldn’t do for what I want. It doesn’t look that good either IMO, the hood is too long, although I accept at that size cruelly enlarged photos won’t help.

It’s one of those things I thought ages ago ‘I wonder if it could be done’, drew it all up with how to integrate into a gantry and then have done nothing with it.
« Last Edit: October 05, 2018, 06:12:46 AM by njee20 »

Offline EastMidsCoal

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Re: Colour Light Signals
« Reply #40 on: October 12, 2018, 09:10:10 PM »
Well having recovered from a chest infection (horrid thing) I can report that my fibre optics arrived earlier in the week, so hopefully might feel like trying something shortly!  I've got some idea's if I can make things work.

Offline DarrwestLU6

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Re: Colour Light Signals
« Reply #41 on: October 13, 2018, 06:24:23 PM »
Well having recovered from a chest infection (horrid thing) I can report that my fibre optics arrived earlier in the week, so hopefully might feel like trying something shortly!  I've got some idea's if I can make things work.

 Glad to hear you are on the mend! Looking forward to seeing the photos of the signals as they develop.... :photospleasesign:

 

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