setting iswhere there is a signal facingoutwardat eachbound-
aryof a signaled sectionof track. See (6, next page).
There are twoways todetect a train in the signaled section
of track:
Optical sensors thatwork forDCorDCC
DCCblockdetection (seemyAugust 2013 column:
.
Optical detectors areavailable inavailable-light and infrared
versions. Since theyarenot dependent uponDCC for their
operation, I’ll ventureaway from the strictlyDCC-relatedworld
and touchon thembriefly.Manymanufacturersoffer products
in this arena. A feware:
Azatrax
offers several products
Circuitronoffers theBD1
LogicRail Technology
hasseveralproducts
5: Schematic diagramof two LED signal for turnout posi-
tion using a live frog turnout it is easy to swapwires be-
tween the LED leads to achieve the desired signal.
5
