Clock battery drain? - Fiberglass RV


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Old 10-16-2009, 12:24 PM   #1
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I'd like to add some analog gauges to my 13' Scamp, mainly a voltmeter and ammeter. I'm thinking the in-dash type you find at the auto part stores. The digital meters are cool, but I think I'd just like a little cluster of analog gauges somewhere. So I was thinking a third gauge could be an analog clock. How much draw on the battery do you think a clock would make? Is this going to significantly affect my battery life while camping for say a weekend?

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-Wilder
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Old 10-16-2009, 04:06 PM   #2
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I don't think the battery drain from an automotive clock would be enough to worry about. I'd either leave the camper plugged in all the time, or plug it in for a day or so periodically.

FWIW, I installed four automotive gauges in my Scamp; a digital voltmeter and thermometer, and amp gauge that has a 30 amp full scale, and a water pressure gauge.

It's been interesting to have the gauges, and somewhat useful. Read all about it on my web site http://scamp.n0kfb.org/ by clicking on modifications and repairs, and scrolling down to gauges.

-- Dan Meyer
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Old 10-16-2009, 04:43 PM   #3
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Dan..... really nice lookin job and the way they light up it really looks nice. I may do the same thing.
Joe
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Old 10-18-2009, 08:14 AM   #4
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Thanks, Dan - that is just what I'm looking to do. Nice job!

You mention you ran one fused wire from the battery to the ammeter. Then another to the inverter's positive binding post? I thought the inverter converts DC to AC, so not sure why you have it in the circuit. Or did you mean to say converter? I guess I understand how an ammeter is wired inline in a positive side of a circuit, but a little confused on how it reads the charging amps when your converter is plugged into shore power. Do you run a wire to the converter?

Thanks!
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Old 10-18-2009, 08:38 AM   #5
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Thanks, Dan - that is just what I'm looking to do. Nice job!

You mention you ran one fused wire from the battery to the ammeter. Then another to the inverter's positive binding post? I thought the inverter converts DC to AC, so not sure why you have it in the circuit. Or did you mean to say converter? I guess I understand how an ammeter is wired inline in a positive side of a circuit, but a little confused on how it reads the charging amps when your converter is plugged into shore power. Do you run a wire to the converter?

Thanks!
What I want the ammeter to measure is total current flowing into or out of the battery. The inverter (aftermarket _INverter_) was just a handy spot to tie into the trailer side, and a new wire was run from the fuse at the battery to the amp meter.

Take a look at the Scamp wiring diagram as it comes from the factory. ( http://scamp.n0kfb.org/manual/electrical.jpg ) since I want to measure all current to or from the battery, the fused lead from the battery was brought into the trailer and run up to the amp meter, then back down to the fuse that is under the bunk.

The circuitry hasn't been changed. The wiring from the battery just runs up thru the meter before connecting where it had originally.

Jeeze - that's long explanation. I hope it make sense!

-- Dan Meyer
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Old 10-19-2009, 05:31 PM   #6
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ok, thanks that makes sense! now time to go gauge shopping
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