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Joined: Feb 2009
Posts: 1,952
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OP
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Joined: Feb 2009
Posts: 1,952 |
hey all,
right im in the middle of setting up a tv screen and dvd player/ radio player all out of a car 12v system in the garage,
but i need a power adapter to run them off, the devices mention no sort of ampage, of course they need a 12v supply, but my question is what sort of ampage will i need from the transformer to run both.
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Joined: Oct 2010
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Forum Guardian
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If i remember rightly,if they have wattage on the back divide by 12 gives you the ampage
Every dog has its day!
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OP
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nope no wattage on them, checked thoroughly 
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Joined: Oct 2010
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Thats funny should have wattage on them.
what sort of tv is it?
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Have you tried them working off a battery charger,a low amp one 8-11 amps
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OP
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ive tried a small 12v battery, i want the transformer as small as poss, i have lots of them lying round so hoping to use one of mine,
tv's only one used for dvd players in car about a 10" if that.
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Joined: Aug 2005
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No model number is there mate?
![[Linked Image]](https://www.wikiwirral.co.uk/forums/ubbthreads.php/ubb/download/Number/13143/filename/sig.jpg) ![[Linked Image]](https://www.wikiwirral.co.uk/forums/ubbthreads.php/ubb/download/Number/13362/filename/rant0000.gif) Putin khuilo
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Joined: Aug 2009
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Careful, you should really use a "Regulated Power Supply" and it's unlikely the battery charger is regulated.
Causing mayhem since 1959
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On my boat,all 12v. i have a 19 inch flat screen which is 40 watts that works fine with a little car battery charger.
Have the transformers got adjustable ampage,if so start off at about 4 amps see if it works if not adjust up till they work,if not wire them up to your small battery and charger.
Every dog has its day!
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As a rough guide the currant draw for each item has to be less than the fuse protecting each item.
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Forum Guide
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The old Curtis monitor and dvd player I have say 3amp for both, there is a load of 12v 3amp or more power supplies about especially at the car boot sales.
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If they are designed for car use (ie happy with 13.8V) then I've used a small car battery charger across a car battery, often letting the battery supply the power by itself at times.
There's a real danger that the left will drag Britain back to the 1970s, with secure well-paid jobs, ample housing, properly-funded NHS and social care, free tuition, student grants, final salary pensions, affordable rail fares and fabulous films and music. David Osland 2025 We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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wouldnt it be a whole lot easier to buy an inverter ?
i do think this is a question for Ohms Law ?
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wouldnt it be a whole lot easier to buy an inverter? Sounds like a good idea!
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Joined: Jul 2008
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Wiki Master
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wouldnt it be a whole lot easier to buy an inverter ?
i do think this is a question for Ohms Law ? Presumably, if they ran of mains, he would just plug it into the mains instead of wanting a transformer 
There's a real danger that the left will drag Britain back to the 1970s, with secure well-paid jobs, ample housing, properly-funded NHS and social care, free tuition, student grants, final salary pensions, affordable rail fares and fabulous films and music. David Osland 2025 We don't do charity in Germany, we pay taxes. Charity is a failure of governments' responsibilities - Henning Wehn https://ddue.uk
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