How to Convert a Cigarette Lighter to an AC Adapter
- 1). Purchase a DC to AC power inverter from either your local electronic store dealer or from a reputable source online. The prices may vary based on power wattage and capabilities, but you can generally find them within the 30 to 50 dollar range.
- 2). Plug the 12-volt adapter on the power inverter into your cigarette lighter socket in your vehicle; power on the inverter (if applicable), then turn your vehicle ignition to the "ON/ACC" position. The DC power will flow through the inverter and be converted into AC.
- 3). Plug one of your AC-powered devices into one of the inverter's power-supply sockets, then power on the device. Your device should now receive AC current once you power on the equipment.
Source...