Inverters advice

Discussion in 'TV & Satellite' started by leslie, Oct 25, 2009.

  1. leslie

    leslie Read Only Funster

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    I AM THINKING OF USING MY LAPTOP AS A T.V.(FREEVIEW) / DVD PLAYER.

    I WAS WONDERING WHETHER THIS WOULD USE MORE POWER THAN A PURPOSE BUILT 12VOLT/240VOLT T.V.?

    ALSO I WOULD LIKE TO KNOW WHAT MIGHT BE THE AVERAGE WATTAGE USED BY A LAPTOP? SO I WOULD KNOW WHICH POWER OF INVERTER I WOULD NEED TO USE.:Eeek:
     
  2. pappajohn

    pappajohn Funster Life Member

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    have a look on the lappy transformer and see what the output is.....

    multiply the amps by the volts to get watts......ie.....5amps X 15volts = 75watts.

    whatever the answer at least double the invertor watts so it isnt running near its limit and will run cooler without cutting out.


    probably better to buy a 12v lappy power convertor....12v to whatever volts your lappy runs on.

    average 12v 15inch lcd tv will use between 2amps and 5amps @ 12v
     
    Last edited: Oct 25, 2009
  3. jezport

    jezport Funster

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    Avoid an inverter if possible as a DC to DC adaptor is more efficient. Some new LCD tvs only use 20w, I would think your laptop uses more.
     
  4. Terry

    Terry Funster

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    Hi I agree with jezport :thumb:but if you want to go the inverter route a small 150w will be more than sufficient.
    terry
     
  5. Phil

    Phil Read Only Funster

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    If you use an inverter it should be the input power to the laptop mains charger that is important as that is what the inverter needs to supply.

    I totally agree with earlier posters that the most efficient way to go is with a dc to laptop voltage converter as sold by Maplin. In that case you need to ensure that the converter is capable of supplying the required voltage and current for the laptop.

    Phil.
     
  6. hilldweller

    hilldweller Funster Life Member

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    But not in my case. There is some surge with my latest laptop that trips a cheap old 150W inverter. I've just got a sinewave 300W one to solve that problem *but* it takes a very unhealthy 0.8A on standby.

    Consistent, this laptop also trips the TRUST DC/DC power supply that was fine with a previous laptop.

    So it's the laptop that is the problem not the laptops external power supply.
     
  7. derekfaeberwick

    derekfaeberwick Read Only Funster

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    I have had similar problems with inverter to T.V. and to laptops and I found that powering up the 'brick' first then connecting the brick to the telly-lappy worked.
     
  8. pappajohn

    pappajohn Funster Life Member

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    that was my impression also but when i queried it i got shot down in flames.:cry:
     
  9. Terry

    Terry Funster

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    I stand corrected Brian :cry::thumb:
    terry
     
  10. pappajohn

    pappajohn Funster Life Member

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    found the original thread regarding this post....

    read the banter between myself and sinbad1. it runs over all three pages from post No 6.

    invertor/laptop power.
     
    Last edited: Oct 26, 2009
  11. hilldweller

    hilldweller Funster Life Member

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    Not corrected at all, it was a perfectly logical suggestion, my previous computer worked OK and in theory this one should work OK.

    I was just making the point that sometimes real life bites you in the bum.
     
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