Hello, i'm a complete beginner to Arduino. My aim is to make my own button box but really want to use the 12v LED levers and switches. Now from looking around and asking on Discord the best way seems to be using MOSFET resistors, in particular the IRLZ44N.
Now that brings the other question firstly of how i could calculate how many amps the power supply has to be and which ohm resistors to put.
Secondly as i understand the Micro has internal pullup resistors for if you choose to power the board with 12v through the RAW pin, could that output 12v through other pins? If not for what use is it?
Lastly i've also seen button boxes with LED levers that use 1 single usb cable, which makes me wonder how they supplied 12v? As i cannot find LED levers or switches that are 5v or less. I assume 2 cables are mandatory, 1 to connect to the Micro and 1 for the power supply.
So could it be those are made with something else then Arduino or am i missing something obvious?
Like what happens if you connect a 12v led to a 5v power pin? Does that make the 12v LED just be dimmed but do function or wouldn't that work at all?
Finally (i promise) is there some component like the DC connector but as a micro usb port that could function as a power supply connector. I guess there must be but can't find it for the life of me.
Thank you so much for your time!