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Anti surge on motorbike

Discussion in 'Sensors and Actuators' started by R Harding, Jun 12, 2017.

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  1. R Harding

    R Harding

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    Jun 12, 2017
    Hello All,
    For a number of years I have had a speed camera detector device in the draw, I used in a car 15years ago.
    I tried it on a motorbike back then but it triggered all the warning lights every 10 -20 seconds as I was travelling on the road. I contacted the company but they had no idea why, so it ended up in the draw for years.
    I am planning a trip to Scotland on a motorbike (which has a 12 volt and USB sockets fitted) this summer and decided to try the old detector again. The exact same thing happened again in the 12 volt socket, but in the 5volt USB it was fine? But travelling a long distance plugged into the micro usb socket on the device is not good for the connection as it vibrates on the windscreen , so I would prefer to connect it to the 12v Robust sockets.
    My theory is ... as the 12v socket on the bike is wired directly to the battery, as I twist the throttle the magneto is pushing amps into the battery and also to the device which triggers all the warning lights to activate (the same as switching the device on).
    So to my question ... is there a component resistor, diode, that I can fit from the battery to the 12v socket that would deliver a constant current to the socket as a stand alone battery would?
    Any Suggestions would be appreciated.
    Thanks Bob H.
     
  2. Tha fios agaibh

    Tha fios agaibh

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    Aug 11, 2014
    In my opinion radar detectors are ineffective.
    The same companies that sell them to civilians also manufacture the technology that law enforcement use. So law enforcement is usually a step ahead of you in technology and the older version detectors are worthless.
    Besides, all the police have to do is wait until the see you and trigger the radar or lazer gun and you are snagged.
    There quite a few things that can give you false triggers on your detector but I agree a loose socket is one of them. I don't think amperage is your problem as the detector will draw the power it requires regardless of throttle position. Voltage on the other hand could climb depending on your engine rpm.
    Even that is regulated on modern bikes.
    An easy experiment would to hook up a portable battery to your detector and go for a ride. You may find that ignition noise is your problem, not the supply.
     
    Martaine2005 likes this.
  3. R Harding

    R Harding

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    Jun 12, 2017
    Its not a Radar Detector,its a GPS camera location detector. The bike socket is a 12v and 5v USB, I repeat ... It works fine in the USB which is obviuosly transformed so dosn't experience Voltage surges from the "magneto".
    If it was ignition noise it would cause the same problem while plugged into the USB? So it must be something to do with the 12v connected directly to the battery and the Mag. Can I fit something to keep the current constant.?
     
  4. Bluejets

    Bluejets

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    Oct 5, 2014
    Might be a bit more helpful if you showed some detail on the unit.
    Seems rather strange to me that you are connecting it to both 5 and 12 volt supplies.
    Adding a constant current supply is in no way going to do anything for you.
     
    Tha fios agaibh likes this.
  5. R Harding

    R Harding

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    Jun 12, 2017
    Its Not connected to both supplies!!!!! Read the thread again. It works on the transformed USB socket but not on the 12v socket which is connected to the battery and the Mag which charges up the battery.
     
  6. Tha fios agaibh

    Tha fios agaibh

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    Aug 11, 2014
    Screenshot_2017-06-14-16-57-27-1.png I read it twice and I thought same thing.
    Why not spend a £ on one of these?
     
  7. Bluejets

    Bluejets

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    Oct 5, 2014
    Ease up.
    People here are trying to help which is why we are requesting further info as opposed to your interpretation of where the problem lies.
     
  8. R Harding

    R Harding

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    Jun 12, 2017
    What is the detail you would like to know that has not already been mentioned in the previous threads. I repeat Bluejets...read the thread again,if not please be more specific with your question. My original question was... Is there something I can fit into the connection from the battery to the 12v socket that will keep the voltage/ current constant as if it were connected to a stand alone 12v battery?
     
  9. duke37

    duke37

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    Jan 9, 2011
    There are buck/boost convertors about which I know not. These should control the voltage.
     
  10. Bluejets

    Bluejets

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    Oct 5, 2014
    Problem is you are assuming where the problem lies.
    What I was suggesting was perhaps it is not where you think.
    Therefore if you think you know better then be my guest and fix it yourself.
     
  11. Tha fios agaibh

    Tha fios agaibh

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    Aug 11, 2014
    Screenshot_2017-06-15-11-09-19-2.png
    Like I said, I suspect a noise problem rather than Voltage.
    If that's the case I'd use a LC that'd filter like above.
     
  12. R Harding

    R Harding

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    Jun 12, 2017
    Thanks to the suggestions from Tha fios agaibh I have fixed it myself. So no thanks to Bluejets Condescending tone of his thread replies.
     
  13. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Good to hear that you've fixed it.

    After reading this thread I won't ask what you did because I really don't want to read any more of your posts
     
    davenn likes this.
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