![]() The present system has LED's that light whilst the train is on the 'short track' and work quite well. The circuit voltage is 24v DC but as the resistor and the coil are similar resistances (about 680 ohms) the potential divider leaves me with 12v below the resistor and 0v below the coil. The signal then resets a latched relay by earthing the point between a resistor and the relay coil or sets the relay by being connected between the other end of the coil and one of its contacts. ![]() This occasionally results in two trains in one section if the second train is moved fast enough. If I don't get an output until the input has disconnected again I can use that to close a relay after the last wheel has left the short section and change the signal light to green to let another train pass, at present the moment the train hits the 'short section' the light changes allowing the train behind to move. It is not 'very clean' because the signal is earth and is picked up by one wheel which through the axle reaches a short section of the other rail that is insulated from the rest of the rail and is connected to the input. The input is derived from connecting it to one track of a garden railway. Or, are you simply trying to make the LED show anĪverage Input-State over a defined Time-Period ? What will the "One-Second-Pulse" Indicate ? ![]() It would make understanding what You are trying to do much easier. If you would just state the overall problem that you are trying to solve Or just one LED indicating the new "One-Second-Pulse" ? ![]() Will You still need an LED Indicator that flashes in response to the "Noisy" Input ?ĭo You want an additional LED that Indicates the new "One-Second-Pulse" ?, How much Current will the Output-Pulse have to Source or Sink ? What specific Voltage is considered to be "High" or "On" ?ĭo you want a Positive, or a Negative, Output-Pulse ? What specific Voltage is considered to be "near-zero" ? How long of a Time-Period must it remain "near-zero" before you want a "one second Output" ? ![]() What are the Voltage Levels that are considered to be "High, and "Low" ? Is it a Binary Signal ?, (either Off or On), or is it an AC Voltage ? ![]()
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