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Author Message
Written on: 13.06.2012 10:33
Lotte
Posts: 13
Sorry but i'm gonna write this in danish
Hey. Vi er en samling af ikke særlig elektronik kendere der har købt en boomblaster. Vi regner med at sætte et bilbatteri til den gennem en inverter/omformer som går fra 12V-220V hvordan gør man det? Hvilke ledninger skal der bruges osv?

[This article was edited 1 times, at last 13.06.2012 at 10:34.]
Written on: 13.06.2012 10:45
Saturnus
Posts: 3047
Why not put it directly on the battery?
Written on: 13.06.2012 10:47
Lotte
Posts: 13
Well because we don't know how to do it either way and decided it would be easier if we used the inverter icon_smile.gif
Written on: 13.06.2012 11:03
Saturnus
Posts: 3047
Easier maybe but also much more expensive and will use a lot of power.

If you connect directly then the boomblaster runs directly on 12V. No loss except for very inefficient amplifier inside the boomblaster.

If you use an inverter, you first have to go from 12V to 230V. And inside the boomblaster it has to go back again from 230V to 12V. Each step incurs a roughly 25% loss. So half you battery is lost for no particular reason.
Written on: 13.06.2012 11:13
Saturnus
Posts: 3047
Btw. I can guide you how to do it but I need to know exactly what model you have bought.
Written on: 13.06.2012 11:14
Jim Daggerthuggert
Posts: 597
Connect + to + and - to - from the battery to the blaster.
Written on: 13.06.2012 11:27
Saturnus
Posts: 3047
Jim Daggerthuggert wrote:

Connect + to + and - to - from the battery to the blaster.


LOL. Probably not that simple icon_biggrin.gif
Written on: 13.06.2012 14:36
Lotte
Posts: 13
http://www.wupti.com/Produkter/TV-HIFI/Lyd/160834/JVC--RVNB50-Graa.html This one icon_smile.gif
Written on: 13.06.2012 14:57
Saturnus
Posts: 3047
Du skal bruge

http://www.amazon.com/Roadpro-Battery-Clip-On-Cigarette-Lighter/dp/B00065L2D8

og

http://www.ebay.com/itm/Car-DC-Adapter-4-JVC-RV-NB70B-Kaboom-RVNB70B-Dock-BoomBox-Auto-Power-Supply-Cord-/350568868479?pt=LH_DefaultDomain_0&hash=item519f886a7f

Sæt klemmer på batteriet. Rød er til plus. Sort er til minus. Sæt DC stikket i kaboom'en. forbind de to.

Du kan også gøre det selv meget billigere hvis du har mod på det.
Written on: 13.06.2012 15:21
Lotte
Posts: 13
Tusind tak icon_smile.gif
Written on: 26.06.2012 21:26
Simon B.
Posts: 44
Hey,

Jeg har lidt det samme problem, som Lotte - er der nogen mulighed for at man kan gøre det samme med dette anlæg (altså køre det på et bilbatteri):

http://www.retrevo.com/support/Philips-AZ2000-Boomboxes-manual/id/288ag020/t/2/

Det ville være super med en fiks idé, så vi kunne høre lidt roskilde radio liiidt længere.. icon_wink.gif

Tak på forhånd! icon_smile.gif
Written on: 12.07.2012 14:25
Mads Jensen
Posts: 3
Hej Simon

Din ghettoblaster kører på 6 batterier, dvs. 6 x 1,2V = 7,2V hvilket altså ikke passer med et bilbatteri på 12V. I henhold til manualen er der ligeledes ikke noget DC stik bag på den, kun et 230V AC stik.

Hvis du skal koble det sammen med bilbatteriet skal du altså gå den vej som Lotte nævnte. Men der er som nævnt en del tab i denne løsning. Til gængæld indeholder et bilbatteri dog så meget strøm at du nok ikke vil mærke problemet så lange du slukker 12-230 konverteren når du ikke bruger den.

Jeg regner dog med at du med nogle gode D batterier (9000 mA) kan opnå 16 timer med fuld knald på. Hvis altså du dynamisk trækker halvdelen af makseffekten fra din ghettoblaster, som er på 2x4 Watt. Så måske er det nemmere bare at holde sig til D-batterierne icon_smile.gif

/Mads
Written on: 12.07.2012 14:51
Mads Jensen
Posts: 3
Rettelse

Jeg regner med 9000 mA, da dette er hvad mine egne genopladelige indeholder.
Hvis du bruger alkaline holder det nok endnu længere.
http://en.wikipedia.org/wiki/D_battery


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