Setting time without rtc.


I need to be able to set time, using a button and then a 4x4 keypad. I have made the clock work on the lcd by using a potentiometer, now i just need help on the setting time bit.

Anyone who knows how to this?

Look at your Casio wristwatch. Or borrow one from a friend.

There is a mode button, increment button, select button.

Other products might work with a single button. e.g. long press to start. short press for increment. long press to select.

You can implement something similar on your Arduino with push-button(s)

There are many household items that implement "setting" without a full keypad. e.g. Central Heating, cycle computers, bedside alarm clocks, ...