Minecraft wiki entry for Pulse, associated text: Pulse logic is a different approach to binary logic than standard redstone power binary (power present = 1, power absent = 0). In pulse logic, the pulse is a toggle of logic level of the contraption: (first pulse = 1, second pulse = 0). This approach allows implementing computational logic that operates not only on redstone signal, but also on block updates, and block positions; in particular implementation of mobile logical circuits in flying machines, and significant reduction of server-side lag through avoiding redstone dust, transporting signals through block updates instead - e.g. over Powered Rail. In many cases use of pulse logic also results in more compact circuitry, and allows building 1-tileable modules where classic redstone power would "spill" to the neighbor modules.