Model railroad reversing motor control system

  • US 5,184,048 A
  • Filed: 02/14/1990
  • Issued: 02/02/1993
  • Est. Priority Date: 11/16/1984
  • Status: Expired due to Term
First Claim
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1. A reversing motor control circuit for use in a model train system having a track coupled to an interruptable electric power source for providing a track power signal, the circuit comprising:

  • input means for receiving the track power signal;

    a pair of flip-flop circuits interconnected to form a clocked ring counter for indicating a present state that is one of a predetermined sequential series of states, the counter having a clock input for receiving a clocking signal to change the present state to a next one of the series of states;

    clocking means coupled to the input means and to the clock input for providing the clocking signal to change the counter state to a next one of the series of states in response to an interruption in the track power signal having a duration of at least a predetermined clocking period;

    a first logic gate coupled to the counter to decode the flip-flop outputs to form a forward signal;

    a second logic gate coupled to the counter to decode the flip-flop outputs to form a reverse signal; and

    power control means coupling the input means to the motor and responsive to the forward signal for driving the motor in a forward direction and responsive to the reverse signal for driving the motor in a reverse direction.

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