T FLIP-FLOP (TOGGLE)

When to Use

Button-operated piston doors, toggle lights, any mechanism that needs on/off switching from a single button.

Materials

• ▸1 Dropper
• ▸1 Hopper
• ▸1 Redstone Comparator
• ▸1 Redstone Dust
• ▸1 Item (any)

T Flip-Flop (Toggle) materials, and what they cost to craft

What each part of T Flip-Flop (Toggle) costs to make, one piece at a time

Goes into T Flip-Flop (Toggle)	Count in one T Flip-Flop (Toggle)	Price of a single one
Dropper	1	7 Cobblestone, 1 Redstone
Hopper	1	5 Iron Ingot, 1 Chest
Redstone Comparator	1	3 Redstone Torch, 3 Stone, 1 Quartz

Every T Flip-Flop (Toggle) figure in this table is read off the Java Edition 26.2 recipes.

The T Flip-Flop (Toggle) in short: what it is and what it does

Toggles its output state with each input pulse. Press once = ON, press again = OFF. Converts any momentary pulse (button) into a toggle switch behavior.

As a memory circuit it stores a state and holds it after the input goes away, giving redstone the equivalent of a saved bit.

Where you tend to meet it: button-operated piston doors, toggle lights, any mechanism that needs on/off switching from a single button. All 6 of the build steps below are written for vanilla Java Edition 26.2.

What happens inside the T Flip-Flop (Toggle) when it runs

The dropper-and-hopper design moves a single item back and forth on each input pulse, and a comparator reads whether the item is currently in the dropper, flipping the output. One press is on, the next press is off, turning a momentary button into a toggle.

The parts list is short and every single entry on it matters: 1 Dropper, 1 Hopper, 1 Redstone Comparator, 1 Redstone Dust, and 1 Item (any). Swap one of them out for something else and the T Flip-Flop (Toggle) stops behaving as it should.

Because this is a memory circuit, the thing to watch as you build is the input isolation, stray power on the wrong line can flip or corrupt the stored state.

How to lay out a T Flip-Flop (Toggle)

1. 1Place a dropper facing up.
2. 2Place a hopper on top of the dropper, pointing down into it.
3. 3Put one item in the dropper.
4. 4Run a redstone comparator out of the dropper to read its contents.
5. 5Power the dropper with your toggle input (button).
6. 6Each pulse moves the item: dropper → hopper → dropper, toggling the comparator output.
7. 7Power it up and watch one full cycle: confirm it holds its state after you release the input before wiring it into a larger contraption.

Where the T Flip-Flop (Toggle) earns its keep

• ▸Button-operated piston doors, toggle lights, any mechanism that needs on/off switching from a single button.
• ▸Dropper-hopper T flip-flop (compact, 1-wide tileable), a variant suited to particular space or timing needs.
• ▸Piston T flip-flop (piston pushes block between two positions), a variant suited to particular space or timing needs.
• ▸Dual-edge T flip-flop (toggles on both press and release), a variant suited to particular space or timing needs.
• ▸JK flip-flop (generalized version with separate J and K inputs), a variant suited to particular space or timing needs.

Tips & common mistakes

• !Feed it a clean single pulse, a bouncy or doubled input can toggle twice and leave the output where it started.
• !Label or colour-code your Set/Reset (or Data/Enable) inputs while building; mixing them up is the usual cause of a latch that will not hold.
• !Remember that bare redstone dust loses 1 signal strength per block, so insert a repeater before any run exceeds 15 blocks inside this circuit.

Circuits that share parts with T Flip-Flop (Toggle)

5 other circuit pages tie straight into T Flip-Flop (Toggle), and here is what the link is:

• Monostable Circuit, 2 shared parts
• Edge Detector, 1 shared part
• Memory Cell (Addressable), 1 shared part, and the same group as T Flip-Flop (Toggle)
• Repeater Clock, 1 shared part
• RS Latch (RS NOR Latch), same group, and 1 shared part