Anyone who has a garage, knows what a pain it is to open the door themselves to let their car in and out. The answer, of course, is an automatic door opener and you can save some of the expense of having one by installing it yourself. Here’s what you’ll need.A garage doorTake note of what kind of door it is, there are the single section swing doors, bi-fold doors and multi-section doors that slide up on tracks. When purchasing your automatic garage door opener, make sure the device is compatible with the door type you have. Also, ensure the door is functioning correctly and slides easily. Starting with a problematic door will only lead to frustration when installing the opener.PowerThis may be one of the things you’ll want to be professionally installed. The garage door device requires power in order to life the door. Special voltages aren’t usually required, but heavier duty openers may have special requirements. The photoelectric eyes that tell the opener whether there are obstructions or not need power as well.Heavy duty angle ironThis is for constructing a bracket that will hold the opener in place. When positioning the opener, put it on a ladder to hold it in place and get the right height while constructing the brackets that will permanently house it.Once all the parts are assembled, use the included guide that comes with the opener for specific instructions. Although most openers operate in a similar fashion, each type can have different specific requirements. Pay attention to the install instructions, use the proper general safety precautions and installing your garage door opener can be a fun afternoon project.