Recent content by EllBe

Thank you for the hints! :) The teacher didn't tell us much about the transistors though we have to use one for this project. She provided us with resistors, a NPN transistor, LED, buzzer, wire, battery and the battery connector; and we have to use all of them. Can you explain for me what's...

Please help me with my school project! I'm in AP Physics in High School right now, and the teacher just assigned our class to design a locker alarm. It must turn on when the locker is opened and turn off when the locker is closed. However, there's a restriction: the alarm must turn on when 2...