I have 8 electromagnets already, they will work, and they require 12 volts of DC current. The magnet will be controlled by some kind of a board but that is what I need help with. This is the sensor I was planing to use, but have to purchased them yet: http://store.arduino.cc/ww/index.php?main_page=product_info&cPath=16_19&products_id=96
I will need 4 sensors (one sensor per "station", two electromagnets per "station"). So again, I am not sure how to read the hall sensors, and send 12 volts those magnets at that specific station. I also do no understand electronics that well, where would I find a transistor, how would I make sure it can power my magnets, and how do I incorporate them into the system? Thank you.