If a car charger is something that changes the wall output to something that can charge your car battery, then yeah. You can also just use a wallwart (a giant black block that plugs into the wall).
Those "wall-wart" giant brick thingies have the transfomer, diode rectifier, and capacitor inside them for you (and some have a regulator). Just make sure it's regulated output (there are both regulated and unregulated output versions). YOu can use an unregulated one if your circuit has it's own regulator (it should have one anyways), just make sure the output voltage is within the range of the regulator in your circuit (higher than 5V by enough so the linear regulator can do it's job, but not so high that the regulat cannot handle it).