0 Replies Latest reply on Nov 7, 2018 12:35 PM by integratedcircuitrules

    Light barrier with acustic alarm for the doorway


      Hey Karen, i love The Learning Circuit and how easy you explain the electrical components. I would like to see how you build a light barrier which runs on batteries.

      I could need an acustic alarm with a buzzer (like in your candy thief alarm) when the cat walks into a room she is not allowed to go in.

      Hope to see it on your show.