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Customize product that uses 4 - 6 watts 120V AC to run on DC Answered

I have surfed this site for a LONG time now and have never posted a question so this is my first...!!!

I have a product that I am trying to customize a little but i need some help.,.. The product uses 4 - 6 watts at 120V AC and it plugs into a regular polarized plug... I am trying to make it run on 12V DC but I really don't understand how to do this or the conversions involved....

I have build a 12V 1A circuit but how can i safely make this product use this circuit...??? If it can run on DC power how many Amps will it use...???


Thanks for any replies and I am really looking forward to making this work if at all possible...!!!

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steveastrouk

8 years ago

Its using 4-6 W on 120 V....its using 4-6W on 12V, its drawing just under 0.5 A. YOu don't say what the item is, it may have to run on AC, for the changing voltages - mains clocks for example often need to run on AC

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SummitSeekersteveastrouk

Reply 8 years ago

Thanks for the quick reply and I didn't realize I left out the product. It is a dog bed warmer... It is manufacturered by K & H Manufacturing... here is a linki to the product... I currently have the 6 watt one... Also, it says it only turns on when the pet is present so I assume it has some type of pressure sensor or something...

http://www.petco.com/product/102082/Lectro-Pet-Bed-Warmer.aspx?CoreCat=certona-_-ProductListTopRated_Dog_2-_-Lectro%20Pet%20Bed%20Warmer-102082

Do you think it will work...??? If it will run on DC how many Amps will it use exactly with the 6 watt version???

If it will not run from DC power is there a way to make some of the outgoing DC power turn back into AC power...???

What do you have to do to make a product that was designed to run on AC power run on DC power...??? Is there a quick rundown you can give me or does it get pretty deep...???



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steveastroukSummitSeeker

Reply 8 years ago

Something like a heater has to work on 120V, if it was designed for it, because the heater elements have a very specific resistance for the job.

If you have to run on battery power, you either need an inverter to make 120V from 12, or a new heater ! You'd GET 6 Watts of waste heat at least from the inverter.

Simplest alternative ? A string of 12V LED christmas lights under the bedding.

Steve

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SummitSeekersteveastrouk

Reply 8 years ago

Dang I knew that would happen... In a perfect world i was going to cut a hole in the floor of the doghouse and install the heater flush with the top of the floor, then add a layer of linelioum over the floor and the heater... This way it would be totally concealed and so would the wires and the pressure from the weight of the dog would still kick it on... (The middle of the floor would not be solid it would be slightly mushy because tof the heater being soft like a pad)

There is a pet bed heater that uses DC current but it doesn't have the sensor that kicks it on adn off and i don't want it running all day...

Are pressure sensors difficult to work with and code...??? I have built a motion sensor light before and wrote the code with an arduino so i may be able to do it...

Do you think what i'm trying to do will work if i get teh DC heater and install it like I described above...???

Does anyone have any other ideas...???

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steveastroukSummitSeeker

Reply 8 years ago

Use a solar panel to charge a battery, when it goes dark (the panel output drops to very little, turn on the heater. The heater can be 24, 1Ohm, 0.25W resistors in series, or a length of resistance wire taken from an old electric fire.