Can I convert 12 volt DC into 120 volt?
489114
basically you cannot directly convert 12 volt DC into 120 volt DC, because it is DC. You can only convert these by first convert 12 volt DC into 12 volt AC, using an inverter. Then 12 volt AC can be converted into 120 volt AC through the use of transformer. After which you can convert 120 volt AC to 120 volt DC using a rectifier.
923631
Yes.You have to appropriately reduce the rating and use it at low voltage low current applications.
107063
Yes, a full-wave rectifier can be made with only four diodes. No transformer is required.
443133
hi,\n\ntransformers you can buy for pretty cheap at any decent electronics or  hobby stores (radio shack sucks these days, but they probably still have them).  \n\nhowever you can make them really easily.  all you need is a hunk of steel or iron (some kind of rod-shaped thing would work, as would a donut-shaped loop).  take one wire and wind it around the piece of steel N times.  take another wire and wind it around a different part of the steel M times.  congratulations, you have just built a transformer that will step up/down voltages by a factor of M/N (or N/M, if you hook it up the other way.)\n\ncheers-
145405
if the voltage rating of your motor is 460, you can really hook up to a 480 volts electric s=poer source. the maximum your motor can hanmdle is 460 = 10% of 460 whixh is 506 volts
602903
You don't, any more than you convert between volts and watts.  You can read about dBm in the article below, but simply put, it is a measure of power.
787963
Actually no. I think there is about 5 volts DC. I guess the amount of power available depends on the computer, but it's probably very small. Maybe less that 500ma.
722052
Your car cigarette lighter will put out 12 to 14.4 volts DC at a pretty high current.  If your laptop takes a 12 volt DC external power adapter, then you can connect it directly.  My IBM Thinkpad adapter says it puts out 16 volts, so I would need a DC-to-DC converter to boost the 12 volts up to 16 volts.  One way to do that is to buy a cheap inverter from an auto parts store to make 120 volt AC, then plug the laptop's external power adapter into the inverter.
144848
You need a circuit called an inverter.  These are available to plug into your 12 V socket in your car.  However, use these with the engine running or you could easily drain your battery.
568250
Where are you going to plug in your DC heater?
46766
DC generator would have a rectifier built in to convert the AC to DC.
831976
Yes, you'll need a filter to get rid of the ripple. The voltage will be all in one polarity but will go from some peak to zero volts. You'll need a minimum of a capacitor in there if you want something close to a DC voltage.
79642
Those guys (arc welding power supplies) have high voltage inside, but they output low voltage at high current.\nTry old neon transformers, oil burner ignition transformers (but you need some high-voltage diodes for DC), a discarded TV set (but very dangerous, HV can be stored in various places when you open it). \nFor battery ops you might be able to gin something up with an ignition coil and some sort of primary current interrupter but you'll get pulses, not DC. If you're into DIY, you can rip the flyback transformer from a TV and follow the directions in the ref. Many more such projects if you google High Voltage Inverter". Good luck.
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 .
527732
no, it is not.\n5 volts and 500ma are the max. that doesn't mean you can't hack it up though (i've been looking how too. lots of documenation.) might want to give this a shot\nhttp://www.usb.org/developers/docs/hs_usb_pdg_r1_0.pdf
124558
Use a 12 volt lantern battery and some wires
902006
You might try these folks.  I have used them for low voltage (24 VDC) with great success.\n\nTransorb Electrical Products Ltd, PO Box 1799. Grand Forks, BC, V0H ...