CD4027 is a JK flip flop that is generally used for data storing. Two similar or equal JK flip flops are contained in the IC. Each pair of JK flip flop with IC  has provision of pins J, K, set, reset along with clock and with two output terminals which are complimentary of each other. JK flip flop can be employed in the applications like voice register, counters or else as a control circuit.

JK Flip Flop with CD4027 Circuit Description:

CD4027 is a JK flip flop, master slave which is employed in toggle mode. IC is used to alter the signal by providing control input from one or more input and get output at one or more output terminal. The value of output not merely depends on the present input state but also on what is the present state (also depend on the earlier state). Memory circuit inside  the computer mainly used flip flop.

There are four input pins in JK flip flop named J and K along with set and reset pin and Q and Q— for output. The value of Q and  Q— are opposite of each other i.e. if the value of Q is higher than the value of Q— being low and the output at both the terminals depend on in what way input is configured.The diagram shown below the IC pin configuration.

IC Pin Configuration in CD4027

Logic level present at the input terminal J and K along with internal control is used to control the stage of flip flop. At every positive going cycle change occur in the state. Set and reset pin in this is not dependent on clock pulse and when a high signal is given at any of the input terminals sets and reset pin initiated.

The circuit described is triggered on the foremost rim of the switch pulse i.e. when the switch is pressed once its output alter. As shown in the circuit that both input terminal J and K are set of high value which implies that at each positive or negative transition the pulse of clock fluctuate between high to low. This condition of the flip flop is called forbidden state and with the help of truth table below explains these conditions can be verified.

Working of JK flip flop using CD4027

A small clock pulse  will given to the input of IC  as  soon  as you press the switch as a result of it pin 1 output  became  high. Till the second pulse will receive the output remain high. Load or Led attached with output activates. When the second clock pulse reaches on pin3 IC output turn low and LED or load attached to it become off.

This circuit works on pressing the switch but if you wish to break the circuit all you need is to just swap the position of the switch and resistor.


Electrical engineers design, develop, test and supervise the manufacturing of electrical equipment, such as electric motors, radar and navigation systems, communications systems and power generation equipment.


electrical engineering 3 TESLA-INSTITUTEIf it's a practical, real-world device that produces, conducts or uses electricity, in all likelihood, it was designed by an electrical engineer. Additionally, engineers may conduct or write the specifications for destructive or nondestructive testing of the performance, reliability and long-term durability of devices and components.


Today’s electrical engineers design electrical devices and systems using basic components such as conductors, coils, magnets, batteries, switches, resistors, capacitors, inductors, diodes and transistors. Nearly all electrical and electronic devices, from the generators at an electric power plant to the microprocessors in your phone, use these few basic components.


Critical skills needed in electrical engineering include an in-depth understanding of electrical and electronic theory, mathematics and materials. This knowledge allows engineers to design circuits to perform specific functions and meet requirements for safety, reliability and energy efficiency, and to predict how they will behave, before a hardware design is implemented. Sometimes, though, circuits are constructed on "breadboards," or prototype circuit boards made on computer numeric controlled (CNC) machines for testing before they are put into production.


Electrical engineers are increasingly relying on computer-aided design (CAD) systems to create schematics and lay out circuits. They also use computers to simulate how electrical devices and systems will function. Computer simulations can be used to model a national power grid or a microprocessor; therefore, proficiency with computers is essential for electrical engineers. In addition to speeding up the process of drafting schematics, printed circuit board (PCB) layouts and blueprints for electrical and electronic devices, CAD systems allow for quick and easy modifications of designs and rapid prototyping using CNC machines. A comprehensive list of necessary skills and abilities for electrical and electronics engineers can be found at TESLA INSTITUTE.






Electricity is all around us. We have electric lights, electric clocks, we have mobilephones, calculators, television, V-recorders, CD-players, MP3-players, radio, computers. Light it self is an electromagnetic phenomenon, as radio waves are. The colors of the ribbon on the blue sky are they because of electricity.

                                            Walter Lewin                  



Read more: Electricity


Computer Technology is the study of the hardware and software that are the foundations of modern computer systems. Computers are now a fundamental part of everyday lives, controlling everything from toasters to nuclear power stations. The need to build and deploy effective computing infrastructure is now crucial to business and other organisations.


Operating systems are computer programs that control computers - allowing us to store information and run application software. They must support new hardware with multiple processors, ever faster and larger memories and a myriad of accessories and add-ons. You’ll go beyond Microsoft Windows to learn about alternative operating systems, how operating systems work, and how to set up secure systems.


Modern computer systems depend on the networks that interconnect them. Once built on telephone lines, these networks now run on optical fi bres and carry millions of voice and video conversations. The demand for people who have the skills to build new and better networks is ever expanding; today’s applications require more speed, mobility, reliability and capacity than yesterday’s, and tomorrow’s networks will even more. You’ll gain those skills - learning from networks lecturers who have signifi cant industry experience themselves, and who can show you cutting-edge research and development in this field.



Nikola Tesla (Serbian Cyrillic: Никола Тесла) 10 July 1856 – 7 January 1943) was a Serbian American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current (AC) electricity supply system.

Learn with TESLA


TESLA Project


TESLA Training Center


Sunday the 19th. Custom text here - TESLA INSTITUTE