Hello all, I have a very simple question (im pretty new), I am using an Arduino Duemilanove connected to an spdt relay (thats controlling a 12v motor), turning it on for about 30 second periods or less. Im not using PWM, just simply turning it on and off. What components do i need in order to keep it working, but not fry the Arduino, or is it okay by itself? Also, what would i need to protect it when using LEDs? Would this be a resistor? If so, what type?
Thanks for the help