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  • Despair

    Just nipped up to man cave to avoid peeling Sunday veg and ur30 not counting laps analogue 2 lane system using infra red detectors was alright a month ago tried shorting pin to earth no change of state Using an old printer port HELP

  • #2
    Restart PC ?
    Try different pins,try different ground pins ?

    Comment


    • #3
      Tried all these except ground pin what other number is ground pin ?

      Comment


      • #4
        http://www.slotcarillustrated.com/po...7&postcount=49

        Looks like 18-25

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        • #5
          Have you tested the detection still work fine and the pin signals (high/low) are still raised when a detection occurs?

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          • #6
            Tried a different earth no joy tried all pins 10 to 15 no joy plus on hardware section pins do not change to green even when touched to earth

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            • #7
              Disconnected all sensors and individually tried each pin, no good measured voltage on pins 10 to 15
              10 1.12v
              11 3.75v
              12 0.50v
              13 0.44v
              14 3.33v
              15 3.49v
              Convinced computer is faulty cannot get it to register a lap even when shorting pins. If this is correct what is the best way forward ?

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              • #8
                Depending on what you have for a PC, you might be able to find a parallel port card to put in one of the slots. That might be the easiest fix.

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                • #9
                  you can also use serial ports. USB serial port adapters work fine.

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                  • #10
                    If a computer has a printer port it will also have one or two serial ports, so a serial to USB adapter would not be needed. Ports can get cooked if a voltage gets applied to them and I know for sure that serial ports do not like a dead short. If you must test ports it is better to use a ~100 ohm resistor. You would need a different plug for a serial port. Look on the HO Slot Car Racing site for which pins to use.
                    When I first read your post I suspected that your emitters were not lit, however that does not seem to be the case. It would not be a bad idea to be sure the emitters are lit, digital cameras and camcorders can "see" IR.
                    Last edited by RichD; 07-19-2016, 06:51 AM.

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                    • #11
                      Feeling confident that the end is now in sight, if I can use a converter to a serial port is it also possible to use a converter to a USB port ?

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                      • #12
                        Is it possible to use a usb lead ? thinking of getting 1 & cutting the end off. If so what are the wire colours, settings etc.
                        Thanks

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                        • #13
                          I have never heard of anyone connecting sensors directly to a serial to USB adapter. I have the old version of the Trackmate interface unit and that has a serial output. My laptop computer only has USB inputs, so I use a serial to USB adapter, but the sensors are connected to the interface unit. There are also parallel to USB adapters, I don't know of anyone that has gotten one to work. Trackmate now has an interface unit with a USB output and that works with both UR3 and RC. I understand that you can use an Ardunino Uno board to connect your sensors to a computer with a USB input. Instructions on doing that are included with the RC software.

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                          • #14
                            Despair

                            With the dark nights back and the ever present threat of decorating the man cave is back in use. See previous posts. I have now wired up to the serial port (9pins) and can still not record a lap. The computer has been checked for faults & "serviced" using LPT 1 I get a voltage difference when the car passes the detector but no lap is recorded but do not even record any voltage from serial port. Any suggestions gratefully accepted & acted on.
                            Thanks

                            Comment


                            • #15
                              Originally posted by Esprit View Post
                              With the dark nights back and the ever present threat of decorating the man cave is back in use. See previous posts. I have now wired up to the serial port (9pins) and can still not record a lap. The computer has been checked for faults & "serviced" using LPT 1 I get a voltage difference when the car passes the detector but no lap is recorded but do not even record any voltage from serial port. Any suggestions gratefully accepted & acted on.
                              Thanks
                              I know this probalby sounds dumb, but just making sure you have confirmed that all hardware setting are correct. When switching to a new circuit, it took me a bit to figure out my lap counting problems were that I didn't have the correct hardware settings for the new track. They had reset when I put together the new track.

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