Talk:Update 0.15.0/@comment-28191438-20160603051035/@comment-31132706-20160603074532

Observer block: it activates a redstone signal if the state of the block infront changes i.e. If you place fire with flint and steel the state has changed so it will activate a redstone signal. I don't know if a person walking in front will do anything. Hope this helped! 😉