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Thread: help on building a cheap diy electric heater

  1. #1 help on building a cheap diy electric heater 
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    i want to build my own electric heater by using the mains (220V) as a source of energy. How can i make one and are the parts easy to buy and cheap? I am typically wanting to make a 500-1000W heater.


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  3. #2  
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    I don't think this is a particularly good project to take on. A 1000 watt electric baseboard heater can be bought for around $50. I would be surprised if you could buy the parts for much less. If you don't know what you are doing you stand a very good chance of electrocuting yourself or burning the house down.


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  4. #3  
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    well there are some cheap fan heaters that cost less than $50 so i think there should be some cheap component you could buy. i think they use some nichrome wire or something to heat it up.
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  5. #4  
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    It's quite simple thing. Just buy nichrome wire, heatproof ceramic tube and, of cource, multimeter. Calculate required resistance of heater.
    Wind up wire around the tube, measure its resistance. If it is smaller or larger than that of calculated, then... I think you know what you should do
    Connect the homemade ohmic heater to a power cable, then pray and plug.
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  6. #5  
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    would it be ok if i use the mains socket (220 volts)? or do i have to modify it somehow to make it use less amperage or voltage or both.
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  7. #6  
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    We use homemade ohmic heater to evaporate liquid (for the technical purposes). It is made from stainless steel capillar wrapped by high-temperature insulating tape to avoid short circuit, and nichrome wire is wrapped over the tape. But we connect it to the main socket (220 V) through the variable autotransformer to regulate power consumed by heater. I think if you don't need to regulate power you would connect it directly to the main socket. But it would be better to use variable autotransformer to check if it works properly at lower power level.
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  8. #7  
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    how many watts or how much amps will it draw without the autotransformer? and how much do those autotransformers cost and what do they look like? and also how does it not short circuit? do you connect it directly to the mains socket or is there any resistors or something that prevents too much current from flowing?
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  9. #8  
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    how many watts or how much amps will it draw without the autotransformer?
    It will depend on the resistance of heater:
    P=U*I.
    U=220 V.
    I=U/R.
    So, if you want to draw 1 kW, you should use heater with resistance ~50 Ohm.
    and how much do those autotransformers cost and what do they look like?
    http://www.answers.com/topic/autotra...cat=technology
    and also how does it not short circuit? do you connect it directly to the mains socket or is there any resistors or something that prevents too much current from flowing?
    Of course, we use cutout fuse.
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  10. #9  
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    I still think you should try something less dangerous until you learn more about electricity. But if you are absolutely determined, then learn as much as you can first. Here is a web site that will tell you how to do the calculations.
    http://www.heatersplus.com/nichrome.htm
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  11. #10  
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    Here comes another darwin award nominee....
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