I want to control several (undecided) cut strips of these led lights:here.
I want to be able to turn the LEDs on and off from the arduino, but I know that the voltage is too high to work with with the arduino and I don't want to fry my arduino. I've looked into relay modules, but I'm a software guy and I don't understand even the difference between voltage and amperage (I think I have the idea down, but I get the two mixed up sometimes). I also don't know how much voltage or amperage I should be giving each strip or how to control that. I have all my code set up to control my arduino with my simple C# form I've made, but I'm dumbfounded when it comes to hardware, can anyone help?
Also, I'm not well into money so I'd like to avoid spending money on some relays if possible.