Hi all, I decided I wanted to make my son a countdown timer to show how long before his exams.
I'm new to Arduino so have a couple of questions, I have managed to get the days, hours, min and sec on the display but I cannot get it to start counting down so do I need a Real Time Clock Module or an LCD & Keypad Shield or is it just coding issue.
I was thinking os also having messages appear on school holidays as a remind him to revise. I'm not sure how you would add these messages being I have already given it a target date so would you set it up that on a set date a messages gets displayed or would i have to have to stop the target date the display the message then start a new target date, if that makes any sense. I will address this once i have resolved the first issue.
I'm using a Uno with a 16 x 2 LCD display.
Thank you for in advance for any helpful advice.