Flip flops are a type of sandal-like shoes that can be worn as casual footwear. They have a flat sole that is held loosely on the foot by a Y-shaped strap that passes between the big toe and second toe, typically securing itself around both sides of the foot. While many flip flops are made of lightweight foam, others are made from more decorative materials, which can make them look dressier. They are often used in summer as a convenient shoe choice for wearing when relaxing or walking around.

While sandals are a subgroup of flip flops, they differ in that they leave the back end of the foot exposed and do not include a Y-shaped strap. Sandals also tend to have more decorative materials than flip flops.

A flip flop is a synchronous circuit that can store and change its output signal based on the values of its input signals. It can be triggered by a clock signal to change its state. The delay between the input and the output of a flip-flop is known as its clock-to-output delay (commonly abbreviated as tCO).

In digital electronic systems, flip flops are commonly used to store one or zero for each bit of information. They are also referred to as bistable multivibrators because they have two stable states. The state of a flip flop can be changed by applying a signal to its control input or by resetting its reset input. A J K flip-flop can be designed by using NAND gates.

An important property of a flip-flop is that it remembers its previous state when no signal is present. This is because it has a positive feedback loop. This means that it will not change its output unless the input is a logic 1 or a logic 0. The next time the clock signal comes in, it will cause the flip-flop to remember its previous state and then change to the new state. This will continue indefinitely, with a high probability that the output will be in a metastable state.

The use of a flip-flop in a cascade configuration can help to reduce the chance of metastability. It can be achieved by adding multiple flip-flops in series and connecting their input and output pins. A popular design is a dual-edge triggered D flip-flop. This can be built by cascading two single-edge triggered D flip-flops.

Another kind of flip-flop is the toggle flip-flop, which has a T input and XOR logic. When the T input is low, it will cause the output of the flip-flop to toggle between a high and a low state. The output of the toggle flip-flop can be used to divide a clock signal by using XOR logic.

When someone, especially a politician, flip-flops on a decision, they are changing their opinion or position and doing the opposite of what they originally said. This can be frustrating to voters who believed in the politician’s original decision and feel betrayed.