I'm a novice, and want to make a little thing that requires a user to enter numeric data, and things will display on the 2x16 LCD screen. I've managed to get text displaying on the screen, but now want to do the user entry.
However, the cheap numeric keypads seem to have 8 wires, which end up using a lot of my pins. So I'm out of space. Is there any numeric keyboards that use maybe 2 data plus +/Gnd?
Remember, I'm a novice. It looks like there might be clever coding ways this can be achieved, but - a simple solution would be better for now.