How do I convert 12v to 120v?

So, is it possible to use a 120v switch with a 12v power supply?

Insulation in the 12V switch's 12V switch is not made to withstand 120V (really 170V). No. No. If you touch the switch, it can heat up and cause an electric shock.

Another question is, "Can I use 12v DC instead 12v?" It must have at least 14V to function properly if it is, for example, a typical 12V regulator like the 7812 model. It might be fine if it is a lower voltage regulator, such as a 9V or unlikely 5V. AC current flows through four diodes. DC uses only 2. They must handle twice the current, which may or not be a problem.

This is how you can convert 12v to 110.

You can convert a vehicle's 12-volt battery into 110 AC to allow you to use home electrical appliances, TVs, and laptop computers from your vehicle or recreational vehicle. The power inverter converts the vehicle's 12-volt battery to 110 volts alternative current (AC).

Is 12v AC or DC better?

AC is Alternating Current, and DC is Direct Current. AC, DCH can also be used to refer to voltages or electrical signals that are not currents. A 12V AC power supply, for example, has an alternating voltage which will cause an alternating current flow.