Verilog Code for Electronic Combination Lock System using FSM

Sr. No.	Name of Pin	Direction	Width	Description
1	clk	Input	1	Clock Signal
2	rst	Input	1	Reset Signal
3	b0	Input	1	Input Digit “0”
4	b1	Input	1	Input Digit “1”
5	unlock	Output	1	Status for unlock

In this lock system, only two digits are used to unlock system. With the help of "0" and "1", the lock will be unlock but with specific pattern. This lock will be unlock with "01011" code. If this pattern will be identified by lock then lock will be become open and output unlock bit will be "1", otherwise lock remain close and unlock bit will be "0". This Lock System is developed using FSM and there are total six stages.

Data Types in Verilog Language

A Data Type is a classification of various class of Data, such as Real, Integer or Boolean. And It is important because it determines the value of that type; which operation can be done on values of that type; the real meaning of that data. Every language has its own Data Type.

In the same way, Verilog has it's own Data Types. There are mainly eight Data Types in Verilog which are listed below.

1. Value Set
2. Nets
3. Registers
4. Integers
5. Time
6. Real
7. Parameter
8. Arrays

Logic Gates in Digital World

Logic gates are basic building blocks of any digital circuits. Logic gates are electronics device that gives output on the different combinations of digital inputs. Different Logic gates are constructed using different technologies depending on different Logic Family like TTL, CMOS, DTL, ECL etc. Logic Circuits include devices such as multiplexers, registers, memory units, processors, which contains more than 100 millions Logic Gates.

There are total six Logic Gates are available

1. AND Gate.
2. OR Gate.
3. NOT Gate.
4. NAND Gate.
5. NOR Gate.
6. EX-OR Gate.
7. EX-NOR Gate.

Verilog Code for Gray Counter

Gray code is one kind of binary number system where only one bit will change at a time. Today gray code is widely used in digital world. This will helpful for error correction and signal transmission. Gray counter is also useful in design and verification in VLSI domain. This code will generate gray code. Find out VHDL Code of Gray Counter here.

Implement Divide by 2, 4, 8 and 16 Counter using Flip-Flop

Counter plays a very important role into chip designing and verification. It is a very essential part of the VLSI Domain. Whenever we want to design or verify our design, most of the time we require slowing down frequencies. We can suppress this frequency using this counter by 2, 4, 8 or 16 times. Here circuit diagram and verilog code are given below.