The switch has a breaking capacity of 12V / 20A but how much power does one switch consume?Switches allow current to flow, or not. They consume only minimal amounts of current - so minimal as to be safely ignored.
I know that the digital pin has 5V and 40mA but does the switch take so much power?The power consumed by the switch would be far less than 1 mA.
I am wondering if the value of min 20kohm is too much for a switch it maybe need 1kohmNo. Thousands of Arduinos happily deal with switches using the internal pullup resistors, and they work just fine.
Too buy a external resistor is waste of money
I just need too connect the switch snd anable the internal with a code, it cannot be easier than thise
I have downloaded the program Fritzing and enoy it a lot But can you test the components virtual? Great if you could test it so you do not burn anything