Help for a numpty please


I have used ardunio'a in the past for several model railway projects driving relays and servos. So far so good however this time I would like to use a 4x4 keypad to switch servos and or relays. I can get 4x4 matrix to work but how do I then call a servo / relay function ?

Nothing complex to start the envisaged test been 5 relays with three relays activated with 3 of the servos. I know i could use separate switches but would to prefer to learn how to use a keyboard as future projects may involve multiple servos

thanks in advance


You need to post your code so we can see where you have got to.
And please use the code button </> so your code looks like this and is easy to copy to a text editor

In simple terms, the keypad will allow you to enter and save a number in a variable.

The functions that move your relays and servos can check the value of that variable to decide whether it is their turn to work.

Personally I would avoid keypads for controlling a model railway. I like simple switches or a graphic on a PC screen or a phone. That way I don’t have to remember numbers.

Planning and Implementing a Program