G Ray Stilwell BCD Circuit 5.0

Ray Stilwell's Instant Charge Bipolar Switch Machine control circuit

  1. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    RBrodzinsky submitted a new resource:

    G Ray Stilwell BCD Circuit - Ray Stilwell's Instant Charge Bipolar Switch Machine control circuit

    Read more about this resource...
     
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  2. Pig Gap

    Pig Gap TrainBoard Member

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    This also works for Rokuhan switches in Z scale.
     
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  3. Jonas Grumby

    Jonas Grumby New Member

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    Did he use a maintained switch so that the capacitor will provide a momentary pulse to the turnout and the maintained switch keeps the LED lit?

    On page 1 he said "Although the position of the SPDT switch handle indicates the position of the turnout, a more visible LED indicator circuit is shown in Fig. 2." So it seems like it must be a maintained switch.

    I'm planning on doing this but I bought momentary (On)-Off-(On) switches. I think I should have bought maintained On-On switches. I don't see any reason for an Off position if it's a maintained switch because that would turn the LEDs off and defeat the purpose of using a maintained switch.

    I'm currently waiting for the capacitors to arrive and then I will be ready to test it.

    TIA for any advice.
     
    Last edited: May 1, 2020
  4. Jonas Grumby

    Jonas Grumby New Member

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    I have all of this working now. The maintained On-On switches are perfect. However when he mentions having a "Bicolored LED Indicator" with a SPDT switch in Fig 2 I think he meant that circuit to work with two LEDs of different colors rather than the 3-pin bi-color LEDs that are available now. I'm using one side of the DPDT switch to control the turnout and the other side to control the bi-color LEDs. Works great.
     
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  5. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    It is a two pin bi-color LED. By reversing the polarity, the opposite color illuminates
     

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