first, sorry for my bad english
I'll hope somebody will understand what I need help for.
I'm newbie in Arduino but not in electronics.
I'm developing project for local swim club (my daughter is a member). It is a training light, it is 25 LED at bottom of swimming pool (every meter is a LED). Swim trainer had to input total swim time and number of pool pass and press a button to start. Swimmer swim and watch LED's at the bottom and try to keep his speed accordingly to LED moving speed.
Led's will be controlled via 4pcs. of HC595 (I hope so)
Delay of led moving will be (input time/number of pass)/25. Number of led on/off's will be 25 x number of pass.
LCD display will be 16x2, keyboard is 3 columns 4 rows - numeric only. What I actually need help for is how to interact keyboard and lcd.
Operator will be noticed on screen to input total time, first minutes (he must write one or two number on keyboard and see it on screen, when input is ok than press * button to move on). Than it must input number of pass (also he must write one or two number on keyboard and see it on screen, when input is ok than press *).
I don't have idea how to do that, is there any library or example how to do that or something similar? I saw lot of devices that have this way of input numbers but never seen any Arduino sketch having such thing.
Hope somebody will understand what I need and help me...
This is commercial and very expensive (for local kids swimming club) machinehttp://www.myrthapools.com/eng/virtual-trainer.htm