I need to power 10 meters of 5V LED strip, for which I bought a 40A transformer on AliExpress.
Now, as much as I believe that cheap stuff bought from China can be okay quality, I'd like to make sure I'm sending the right amount of volts in the strip. There is a little screw on the transformer (on the very right) to adjust the voltage but there are no numbers or anything.
My question is, is there a way to measure voltage coming out of the transformer before I plug it in? All multimeters I've seen have maximum limit of 200mA or 10A.
Does this limit apply to measuring voltage as well?
Do you have any other ideas how to make sure I won't burn all my LEDs when I plug them in?