Flip Flops

Question 1

What is a Flip Flop?

Answer 1

A Flip Flop is like a light switch 💡 that a computer uses!
It can remember only two things:
On (like the light is on)
Off (like the light is off).

Computers use lots of these light switches to remember numbers, letters, and everything else! It helps them to remember things.

• Used for digital data transfers and system synchronisation.

Question 2

D flip flop

Answer 2

Has a single data input

D flip-flop is like a copy machine 🖨️ that only works when the clock says “go!” ⏰
D is like the paper you put in.
Q is like the copy that comes out.

When the clock ticks, the copy machine makes a copy of the paper (D) and shows it as the output (Q). So, if D is 1, Q becomes 1, and if D is 0, Q becomes 0!

Question 3

JK flip flop

Answer 3

Has 2 inputs, J and K, where J sets the flip-flop and K resets it.

Sets, resets, or toggles the output based on the combination of J and K inputs (no invalid state).

JK flip-flop is like a seesaw toy with two buttons, J and K! 🤸‍♀️
J button: Pushes the seesaw up (makes it 1)!
K button: Pushes the seesaw down (makes it 0)!

If you push both buttons at the same time (J and K are both 1), the seesaw flips back and forth, like a light switch turning on and off, on and off! It’s super fun and used to count and remember things in computers. 💡

Question 4

RS flip flop

Answer 4

Has 2 inputs, Set (S) and Reset (R).

remembers one value (0 or 1).

It has two buttons:

Set (S) button

Reset (R) button

Press Set (S = 1) → the memory becomes 1

Press Reset (R = 1) → the memory becomes 0

Important rule ⚠️

Do NOT press Set and Reset together

If both are pressed at the same time, the computer gets confused.

Typically asynchronous but can be clocked.

Simple memory storage and control circuits.