ECE216 | Ecp6 | Implementing the flip flop with the help of logic gates

AIM:

The aim of the experiment is to fully understand the functionality of the J-K Flip-Flop.

Apparatus required:

IC 7400, IC 7410, Power supply and LEDs

Learning Objectives:

How to realize the functionality of sequential circuits using basic flip-flops

Theory:

The logic circuits whose outputs at any instant of time depend not only on the present input but also on the past outputs are called sequential circuits.

The simplest kind of sequential circuit which is capable of storing one bit of information is called latch. The operation of the basic latch can be modified, by providing an additional control input that determines, when the state of the circuit is to be changed. The latch with additional control input is called the Flip-Flop. The additional control input is either the clock or enables input.

J-K Flip flop using NAND gate 

Typical wave-form in J-K FlipFlop

Procedure:

1. At first, apply high voltage to Vcc1 & Vcc. So that the "Clock Start" button will be enabled.
2. Next, start the clock pulse by clicking on the "Clock Start" button and after generation of some clock pulses stop the clock pulse by clicking on the"clock Stop" button
3. Now apply high voltage to D input and set "No of clock pulses" to 1. See the changes at the output (Q and Q) at positive clock edge
4. Now apply a low voltage to D input and start the clock pulse. See the changes at the output (Q and Q) at the positive clock edge.

Circuit Diagram:

Truth Table of J-K Flip Flop and Pin configuration of 7410

Observations:

Observation Table for J-K Flip Flop 

Results:

Learning Outcomes:

The student will be able to learn the working of flip flop 9

Cautions:

1. Do not press the IC on the breadboard until pins are aligned with pours
2. Make connection properly
3. There should not be any short circuit in the circuit
4. Avoid the heating of IC
5. Provide proper clock pulse.