how can i build a small inverterfor my room?
471780
I prefer you buying one.  But there are always schematics out there that show you how to create your own inverters.  \n\nhttp://www.aaroncake.net/circuits/inverter.htm
76434
Go to your local electrician's shop
728334
might not have enough watts!!!
408219
First determine size of AC needed for the room based on room size and occupants. If the room is expected to have several people, a meeting room for example a larger BTU capacity maybe needed.\n\nThe manufacturer of the AC will have the Power (watts) and Current (amps) for the given line voltage.\nKeep in mind that a larger AC unit may require 220VAC vs the typical 120VAC.\n\nThe power is the same for both, but the Current is about half for the 220VAC unit vs the 120VAC unit. The 220VAC unit is more reliable. But not all rooms have the 220VAC service, which could require a new branch circuit to be installed.\n\n1000 BTU/h is approximately 293 Watts\n \nFor BTU to Electric conversion check out the following link:
309739
energy efficient, half load button, cold fill, manual programmer (not digital)
737443
Hi there:\nI work with interfaces to computers all the time for my tiny website:\nkidbots.com\nYou can look at the last three discussions related to your question, that I have previously answered :\n\n\nParallel port to 20 outputs\n\nhttp://answers.yahoo.com/question/index;_ylt=AqWHZ_1zgwA2LxeaG7Lgh2nsy6IX?qid=20061013094649AA3FtrD\n\nEconomical package to switch things on/off\n\nhttp://answers.yahoo.com/question/index;_ylt=AqNDTXWkSAqmcHhe6A4g_x3sy6IX?qid=20061024101946AA2VckB\n\n\nWhat can you use a power supply for\n\nhttp://answers.yahoo.com/question/index;_ylt=AtjQVI7ThG2t2vOZ8N0obT3sy6IX?qid=20060901195821AAkrUkV\n\n___________________________________\n\nThese discussions should show you how to get the power you need, and lots of information on how to connect to the computer.\nI will be posting the actual wiring on my website, but not in time for  your answer... Other websites have excellent simple examples, and these are listed in the above discussions..\n\nHope this information helps\n\nrobin.
16785
Buy a DC to AC inverter.  These are used in cars to convert the 12 Volt car battery to 110 V AC to power things like TVs and power tools.  You can get them in auto parts stores or the automotive section of places like Wal-Mart.  Since these are designed for 12 volts, now you need a 12 Volt battery.  To power a set of lights for more than an hour, get a 12 Volt "gel pack" or "Sealed Lead Acid" battery.  A battery store like "batteries plus" will have them, Radio Shack should too.  Also, they are used for things like Power Wheels cars that Wal-Mart sells for little kids to drive around in.  They only weigh a few pounds.
323912
acrtoss the power supply
438317
What you are doing is building a battery, an acid based battery.  take a lemon, get a strip of copper and a strip of zinc from chemistry class, or use pennies and dimes.  insert the metal stips in opposite sides of the fruit and connect a wire to each strip.  with this you will get about a .5volts, take 2 or three and wire is series and you can light a small flashlight bulb or run a small motor.\n\nsee the following  http://www.hilaroad.com/camp/projects/lemon/lemon_battery.html
1026240
less than 0.3  for power sations\n0.5ohm for substation\n1 to 2 for homes
16972
You must first convert the 120 volt ac electricity to 12 volt ac with a transformer.  Then the ac (alternating current) must be converted to dc (direct current) with a rectifier bridge.  Both of these functions are normally handled in one unit such as the small plug in power sources for recharging cameras and cell phones and such.  You don't say how big a fan you want to power but the current rating in amperes of the converter must be great enough to handle the requirements of the fan.
489134
a 400 to 500 watt power supply would solve the problem
808544
Man did u luck out running into me, go to www.sciplus.com "American science and surplus", all sorts of abandon science projects, factory over runs, cancelled government orders, motors, solar cells, weird stuff in the science dept, it's a mad doctors dream come true, CHEAP TOO ! check it out, you'll find lots of "COOL" stuff, that has many uses ! I did a hydro-electric demonstration of power application, that was so small, I could do it in a lab sink, E-mail me if you want an "A", it's an easy experiment, inexpensive, looks very sophisticated, yet simply displays the hydro-electric properties of producing low cost, hydro-electric power, using no battery's or electric for assistance, just water, so it's completely SAFE ! works on displaying milli-amps of D.C. power, yet you are still producing (at a very low voltage) power.
387324
If its a 12v power supply you need then i think Radio shack should have a suiteable replacement  and they have power supplies with changeable polarity. Ebay has them but a lot of looking to find one .
174043
of course you can, provided you are willing to withstand a little noise while it works.\n\nI run a ceiling fan on a inverter, when the power is off.\n\nBut your switch may not work, as the waveform will change, so the formfactor, nad the motor will not work as it works in mains.
970968
Have a look for a USB 1, they are small, consume little power and work well. \n\nmost computer or electrical places sell them
956640
go to  www.onlineconverter.co.uk