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Nonvolatile status indicator switch

  • US 7,738,230 B2
  • Filed: 01/04/2008
  • Issued: 06/15/2010
  • Est. Priority Date: 01/04/2008
  • Status: Expired due to Fees
First Claim
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1. An aircraft electrical system comprising:

  • a fault detection circuit coupled to a relay; and

    a fault indicator circuit coupled to the fault detection circuit and to a control input of the relay;

    wherein the fault indicator circuit includes a nonvolatile memory element comprising a potentiometer having a nonvolatile memory;

    wherein the fault detection circuit is configured to detect a fault and to provide a signal indicative of the fault to the fault indicator circuit; and

    wherein the fault indicator circuit is configured to respond to the signal indicative of the fault by providing a predetermined control signal to the relay and by storing information indicative of the detection of the fault in the nonvolatile memory of the potentiometer.

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