WIFI 120 volt AC run on 12 volt DC

[John1397]

I am getting one of those $10 WIFI units from china runs on 120 volt AC and I want it to run off of 12 volt DC car battery I am thinking will need to open up unit and try to figure out what the DC voltage is that is coming from the AC supply unit and then insert a fixed regulator of 12 or 5 volt or whatever the DC voltage may be.

 

[anorlunda]

You can buy inexpensive 12V inverters that produce 120 VAC. Will that do it for you?