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TDP & Associates, Inc.

Electronics for the Model Railroader
 

 

The ServoMaster can be ordered with several options. 

ServoMaster w/servos (8000) MSRP: $119.95
    ServoMaster PCB, 2 servos, optical sensor cable, output cable
        This option gives you all you need to control a grade crossing with bi-directional single track detection or
        two track single directional detection.  The detectors use ambient light for the detection of the train.  It can
        also be used for controlling semaphore signals and more.

ServoMaster w/o servos (9100) MSRP: $79.95
    ServoMaster PCB, optical sensor cable, output cable
        This option does not include servos as many modelers have servos from previous RC experience or who wish
        to purchase other servos.  The ServoMaster will work with most modern servos, but we have not tested it with
       all types of servos.

Grade Crossing Expansion (8001) MSRP: $47.95
    Expansion PCB, optical sensor cable, expansion cable
        This provides all you need to add another bidirectional detected track for a grade crossing application using the
        optical sensors.  Adding a second expansion kit (GCE) will allow three bi-directional tracks to be detected (you
        will have six sensor pairs to use, for example, to detect a four track main line with the two outer tracks single
        direction and the two center track bi-directional). 
        The expansion sequence is:
                 Bi-Directional tracks            1                2                     3                              4
                 Order codes                    GCS        GCS+GCE    GSC + 2 GCE       GSC + 2 GCE + OPS

Optical sensor cable (8002) MSRP: $16.95
    optical sensor cable
        For expanding the grade crossing optical detection to four bidirectional tracks.  You will need one GCS, two
        GCE and one OPS to get to four bi-directional tracks..

ServoMaster-IR w/servos (9000) MSRP: $169.95
    ServoMaster PCB, 2 'standard' servos, long IR sensor cable,
    short IR sensor cable, IR PCB, patch cable, output cable
        This option includes servos and uses reflective inferred sensors for detection.  These sensors will work in the
        dark.  They include a PCB that allows the sensitivity to be adjusted such that they can be used in tunnels (so
        you don't get a reflection off the roof of the tunnel).

IR Grade Crossing Expansion (9001) MSRP: $109.95
    Expansion PCB, IR PCB, expansion cable, long IR sensor cable,
    short IR sensor cable, patch cable
        This provides all you need to add another bidirectional detected track for a grade crossing application using the
        IR sensors.  Adding a second expansion kit (GCE-IR) will allow three bi-directional tracks to be detected (you
        will have six sensor pairs to use, for example, to detect a four track main line with the two outer tracks single
        direction and the two center track bi-directional). 

IR sensor cable (9002) MSRP: $65.95
    IR PCB, long IR sensor cable, short IR sensor cable, patch cable
        For expanding the grade crossing IR detection to four bidirectional tracks.  You will need one GCS-IR, two
        GCE-IR and one IRS to get to four bi-directional tracks..

So, for example, if you want to set up a grade crossing for three bidirectional tracks with optical detection, and you
need servos, you need to order one GCS and two GCE.  To add a fourth bidirectional track you will need one additional sensor cable (OPS).

Note that optical sensors and IR sensors cannot be mixed within the same ServoMaster installation.

 

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Last modified: 04/03/07