I hooked up 4 leds on my helmet and I want to put 4 more plus a fan, but idk how to add the fan to the same circuit. It says 12v 0.08A on it. I kno next to nothing about what im doing and want to turn the fan on and off. PLEASE HELP. Do i need to run the fan on a seprate power supply? I want to have enough power for long rides. What kind of battery, resistors and components do i need? Im doing my research but im not really understanding