User:MentalMouse42/Sandbox/Misc Diagrams 1

Tiny Charcoal Generator
First appearance: April 1, 2013 from this video.

This lets a furnace producing charcoal feed its product back into the furnace to fuel itself. It needs to be started off with one piece of charcoal (or for that matter, any fuel) in the chest. If more than 5-6 stacks of wood are available, another chest for input can be placed atop the upper hopper.

The chest will not start receiving charcoal until both the furnace and the hopper feeding it fuel (level 2) are full. However, the hopper can be "stuffed" with four non-fuel items in its last four slots, as long as you leave the first slot open for fuel. Then the chest will start getting charcoal after two stacks of charcoal are produced, which will require 2-$1/4$ stacks of wood.

As usual, using a hopper to take product from a furnace forfeits any experience from the smelting.

Compact JK Latches
Courtesy of Munin295:

The J and K inputs need to be at least 2 ticks long. The circuit delay is 2 ticks, but it takes time to stabilize for the next input so it can only handle a 5-clock (e.g., a 2 Hz clock line).

You could make it a flip-flop by feeding a falling-edge clock line into the other sides of the input comparators. Also, I think if you build this facing east or west, you can move the piston back one block and adjust the rest to make the circuit one block shorter (it needs the repeater for the general design because of the circuit breaker directional bug).

More at http://www.minecraftforum.net/topic/1799092-so-anyone-have-a-compact-jk-flipflop-yet/#entry22311242

So, Munin, did I get these right?

Hopper T Flip-flop
The A variant has a size of 1&times;2&times;3. The B variant puts the input and output inline, but changes the footprint to 2&times;2&times;2, or 4&times;2&times;2 if you want fully powered input and output. Its major drawback in survival mode is requiring a comparator, meaning Nether Quartz (it also costs 5 iron, 9 redstone, and some wood and stone). The B design can also be tiled in line, side by side, and even (by reversing alternate rows) vertically. Once built, place a single item inside any of the containers and it will work as a T Flip-flop, with the item cycling between the two droppers. The core has a 1 tick delay between input and turning off or on, but the optional repeaters can raise this to 3.

First known appearance: 23 March 2013 on this forum thread.