User:Munin295/Clock circuit

Hopper clock

 * Subtraction-Latch Hopper Clock


 * 3&times;6&times;2 (36 block volume), flat, silent


 * Earliest Known Publication: 18 February 2013

Multiplicative hopper clock
A single-stage hopper clock can create clock periods up to 4 minutes, 16 seconds. Each additional stage in a multiplicative hopper clock (MHC) multiplies that period by up to 640: up to 45.5 hours for a 2-stage MHC, up to 3.3 years for a 3-stage MHC, up to 2.1 millenia for a 4-stage MHC, etc.


 * Compact MHC


 * This clock is capable of creating extremely long clock periods in a very small space.


 * The first stage can control the second with a simple redstone torch, but later stages use pulse limiters because a torch would stay on for an entire cycle of the previous stage. This design uses a hopper-dropper pulse limiter that generates a 4-tick pulse from the hopper out of a rising-edge signal into the dropper (so instead of pulsing when the control hopper empties, it pulses when the control hopper receives its first item in a cycle). Use a non-stackable item (such as a wooden shovel) in the dropper so that the hopper's output will reach across both redstone dust controlling the torches under the next stage's hoppers.






 * 1-Wide Tileable MHC


 * 1&times;8&times;7 (56 block volume), 1-wide, tileable


 * Slightly larger, and more difficult to build than a 2-stage Compact MHC, this design is only useful when you need a 1-wide tileable clock with a period greater than 4 minutes.


 * Instead of turning both torches under the second stage off at the same time (as the MHCs above do), this design alternates turning one torch off then the other, trusting the block of redstone on top to keep items flowing in the right direction.


 * You can turn this MHC on and off with a lever on one of the blocks powered by the shortest-period hoppers (lower-right of schematic), or with a torch under the same block to keep it 1-wide. Alternatively, you can provide power to both of the bottom hoppers to pause the clock instantly.