I need to make a sketch that uses temp. [450°] to start a timer for 25 minutes. When the timer starts, it will illuminate an Green LED, signaling that the timer is running. After 25 minutes has elapsed a red LED will then illuminate stating that time is complete.
I wish to use an LCD to display real time temperature as well as lapse time.
I will be using Arduino Mega 2560 board.
Any help and other devices needed will be greatly appreciated.