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Arduino countdown timer with setup buttons
Hi, Could you please help me. I am very new to arduino. Just purchased an arduino leonardo several weeks ago and have not been able to get a project up and running. I have been using codebender and breadboards to prepare circuits. I love this project but am adding a relay to the buzzer trigger and need to count down from 30 seconds. How do I modify program for 30 seconds.Best RegardsRussell