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  1. #1
    Moderator Krugar's Avatar
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    Way off topic electrical question

    I seem to recall there are some electrical guys hanging around & I'm trying to get a opinion, if you have time.

    It was suggested that line noise may be causing a failure in my GPS in my Buick. So it being a Sunday & me being impusive I went to Radio Scrap, picked up a 10A line filter, a male & a female auto plug & wired them up.

    The debate is if this is enough. I think adding to the circut is over kill, there's already a fuse in the box & even though there would be a line spike before the fuse pops (if it pops) that's why the filter is there.

    The add more side is anything from a simple 10A fuse to this: http://www.maxim-ic.com/appnotes.cfm?appnote_number=760

    This is the filter & it was (as expected from Radio Scrap) missing it's documentation: http://www.radioshack.ca/estore/Prod...log=RadioShack The site also doesn't say anything other than 10A noise reducing filter.

    The disadvantage I have in the discussion is I really don't know if RS put anything more than a resitor & a capictor in the line filter. (Anyone?)

    So any opinions? Do you think my zoos will be able to find out where they are?

    Cheers!

  2. #2
    liv
    liv is offline
    Former Moderator liv's Avatar
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    the name of the electrical guy, i think its "xlink".. but could be wrong.
    as for the filter, all depends on the problem ( noise or other )
    if its a pulse or a variation of current in the line a normal filter like you put in wont do a thing. did you monitor the current in the car while driving of when your gps got the failure.

    alternators dont charge as much at idle.. so the voltage may drop a few volts... or your alternator might be charging too much .( i sign of a dead or dying alternator )

    check it out and let us know.

    moving.. so temporarily out of SW :b8:
    planning next tank, possibly 60x30x20 on 2x plasma.
    updated: 2011/05/30

  3. #3
    Moderator Krugar's Avatar
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    Well I thought the problem was noise which is why I picked up the filter. Now it looks like it could be as simple as a power surge when I start the Rendezvous & me being an idoit & having the gps plugged in when I start the truck.

    If that's the case I think I just tossed $30 down the drain & I'll have to look up zenner diodes to try & remeber how to use them.

    Anyway, I haven't done this for at least 9 years, so aside from being rusty as all hell in electronics, I don't have 1/4 of the toys the repair shop used to.

    Oh & the failure is cute, it blows out the antenna on the GPS.

    Or maybe I'll eventually learn to disconnect the gps before I shut off the car & only plug it in after I start it.... sigh.

    Cheers!
    There is nothing so permanent as a temporary measure.

  4. #4
    liv
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    Former Moderator liv's Avatar
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    I would put it on a switch and turn it off before closing and starting the truck or at least a timed relay.

    definitly sounds like too much or too little current
    get a voltmeter and hook it up on the same circuit its on..then simulate when it blows up.

    moving.. so temporarily out of SW :b8:
    planning next tank, possibly 60x30x20 on 2x plasma.
    updated: 2011/05/30

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