Hey guys, Im new to electronics and circuits but im fairly good at residential wiring and building stuff. Im wanting to build a break beam sensor to turn on a light ( for a staging light for ATV drag racing). The sensors need to be able to be spread 6' to 8' apart. I have found several diagrams but am unable to understand them. Does some one have a diagram that is a little more user friendly to a novice builder. Also, i am currently have the staging lights built to where i can plug them in to an outlet and turn the lights on by a light switch, Is there any way to hook a sensor to this are will the lights have to be run off of 9v battery or something. Im sorry if this is the wrong place to post this or it is a dumb question. I have searched and searched and have not been able to find anything close to what i am wanting to build. Any help will be greatly appreciated.