GANDTT

Re: GANDTT

Postby CSD » Sun Mar 03, 2013 12:43 am

krokodil wrote:... occupancy detectors - around 50 pcs! ...


Cool. Very elaborate track plan. Should be fun. What detectors are you going with?
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Re: GANDTT

Postby krokodil » Sun Mar 03, 2013 3:38 am

I use since middle of 80-ies the occupancy detectors developed by Bruce Chubb (http://www.jlcenterprises.net/). They work fine for analog and digital systems (I still use analog, but made plenty of detectors for my friends for their digital models).
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Re: GANDTT

Postby CSD » Sun Mar 03, 2013 11:03 am

Interesting site. Thanks for the link. I don't have the patience to build my own detectors, so I'm going ESU.
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Re: GANDTT

Postby ConducTTor » Sun Mar 03, 2013 1:02 pm

Thanks from me as well for linky.
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Re: GANDTT

Postby krokodil » Sun Mar 03, 2013 1:24 pm

ConducTTor wrote:Thanks from me as well for linky.



There were some articles from Chubb in the MR.
That time I did not have a PC yet, but I had a Sinclair computer (64k) and build my port extension device (64 ports together). With the occupation detectors and the Sinclair I managed to build my first computer controlled layout.

:wink: :wink:
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Re: GANDTT

Postby krokodil » Wed Mar 06, 2013 2:41 pm

Here are the first occupancy detectors:
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image001.jpg
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Re: GANDTT

Postby CSD » Sat Mar 09, 2013 9:19 pm

Pretty slick, man. Are they built from kits or do you make your own circuit boards?
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Re: GANDTT

Postby krokodil » Sun Mar 10, 2013 12:42 pm

CSD wrote:Pretty slick, man. Are they built from kits or do you make your own circuit boards?

Thank you!
Everything is home made, except the fabrication of the PCBs. At this amount it was cheaper to order them.
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Re: GANDTT

Postby Bill Dixon » Wed Mar 13, 2013 12:19 am

I tried to recreate the original G&D using Tillig bedding track.

The result uses R2 curves and is almost as large as the original HO scale G&D
It ended up at 60" x 44". You could make it smaller by using R1 curves but I wanted to be able to use North American equipment.
The Blue track is at 0".
The yellow track climbs up to the second level - Green track.
The Red track climbs higher.
I have not calculated the grades but they would be steep.
2013 G and D TT.jpg


There is room for another turnout or two to add more operational interest but this will mainly be a scenic layout.
Might be fun to build.
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Re: GANDTT

Postby ConducTTor » Wed Mar 13, 2013 1:34 am

Wow - that's tight.
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