I was just wondering if it would be a bad idea to leave my arduino running nonstop without turning it off for extended periods of time (Maybe for days or even indefinitely). I was thinking of keeping it in a type of suspended mode until it reads an input value and have found a link to some suspend mode, but am already using an interrupt. I did find a website (http://www.arduino.cc/playground/Learning/ArduinoSleepCode), but power isnt really an issue. I was just wondering if leaving my arduino MEGA running would decrease its life or break something.
As of now, I am using it as a speedometer in my car and have a switch to kill the power. I would like to make it sit there and wait until the car starts before it activates to make it more streamlined. Would you suggest using a sleep mode, leaving it on, or just using the setup I have now with the manual activation of the switch.
Note: The arduino is also connected to three seven segment displays which are constantly on, displaying zeros if the car is at a standstill, but I think I can modify my code to turn them off after displaying zeros for maybe more than a minute.