I have an ARM platform with a 1.8v UART and I want to connect my Arduino to it, but I'm afraid of ruining it. I heard about using logic level converters but surprisingly many of the sources recommending this don't have a particular model to recommend, and I can't find any that work at a 1.8v to 5v range.
I'm open to using transistors and resistors to get the job done (I have a resistor that'll do the trick) but I can't figure out how to use a transistor to amplify the 1.8v TX signal to 5v. I know how to use a transistor for something that has an input pin and an output/ground, but I don't know how to use one for something that's basically a direct shot, and I'm afraid of ruining something.
I'm sure this is a stupid question to ask but after an hour or two of searching I can't seem to get a complete answer anywhere.