Thank you Don, for your comments.
I have done all the tables for this. It will not be required that anyone knows this. But, for those who have that interest, I may include it.
This system will work with G scale too. The detectors would of course, have to carry higher amperage. As the actual signal system is completely isolated from track power, the only difference I can foresee, would be 5mm led's. This would require a higher amp 5v power supply.
There are three ic's that will work as drivers. 7400hc, 74ls00 and 74hct00.
CMOS cannot be used!
Turnouts have two ic's per board. 7432 and 7408. Same parameters as above. Rail crossings have 3 ic's per board. 7432's
I am getting way off subject.
The heads are where I will begin. Here are some pics of the heads. I will show more pics of sbs construction with all the info and materials.
They are a scale 34" in width in 1:48.
They led's are 3mm or a close 6" lens. They are on 1/4" centers, which is prototypical.
The measurements for the signals are taken from Wayne Rodericks drawings. He is the owner of the Teton Short Line.
Dave
Seattle
