(
LOGIN to comment on this article.
)
Investigating switches ! 4AG/HS
05 Jul 2013
Today in science the class were challenged to design switches for different sorts of appliances. They had to design a switch for a light which would stay on if necessary; a switch for a lawn mower which would only operate if it was held down and finally a switch for a burglar alarm which activated a buzzer when someone stood on it.