 Namaste, welcome to the session design of BCD2 7 segment converter using decoder IC. At the end of this session students will be able to design a BCD2 7 segment converter using decoder IC. Code Converter Code Converter is also a combinational circuit. So it is a group of symbol later or word when used to represent a digit or the reverse process is known as a code conversion. So take a pause here and recall what happened by BCD and 7 segment display. So BCD is nothing but binary coded decimal or it is also known as national binary code. So in natural binary code or BCD 0 to 9 decimal numbers are directly represented by 4 binary bits. 7 segment display it is nothing but it is a combination of 7 light emitting diodes which are arranged in a such a way that it will display 0 to 9 decimal numbers along with that it can also display capital A to capital F letters. So 7 segment displays are of two types common anode 7 segment display and common cathode 7 segment display. Let us see what went by BCD to 7 segment converter. So it is a combinational logic circuit which consists of 7 segment display to display decimal numbers in digital systems for using this display device the data has to be converted from the BCD number. So such a BCD to 7 segment converters are used in electronic calculators watches and many more digital systems. Now let us see BCD to 7 segment converter. So this is how it looks like 7 segment display where it may be common anode display or common cathode. So clockwise there are 7 segments named as A, B, C, D, E, F and center one is known as G and this is the block diagram for BCD to 7 segment converter using decoder IC. So here you can see there is a BCD to 7 segment decoder or a driver IC which has 4 BCD inputs named as A, B, C, D. So BCD to 7 segment decoder or driver has 4 BCD inputs and 7 outputs which are nothing but A, B, C, D, E, F, G which are connected to 7 segment display and one of the part is common that common part may be anode or cathode. So this is true table for BCD to 7 segment converter for a common anode display. So it means that all the anodes of 7 segment are connected together 2 plus VCC and just we have to connect the cathode part which is coming from the BCD to 7 segment converter. So as we know that we have 4 BCD inputs and 7 LEDs. So here to glow a particular segment we have to give 0 here because anode is connected which is connected to the logic one. So to glow a particular display we have to give 0. So that will glow. So accordingly the true table is written. So as there are 0 to 9 decimal numbers so you can see over here all are represented by 4 binary bits and you can see here particular decimal is gate displayed. So here we are designing BCD to 7 segment converter for common anode display. For common anode display we require a driver AC which is known as 7447. So here you can see 74LS47 BC to 7 segment decoder which has 4 BCD inputs as ABCD and it has 3 more inputs. These are control inputs known as LT which is for lamb test RBI, ripple blanking input and RBO which is nothing but ripple blanking output. All are connected to plus VCC for normal operation and output of 7447 IC is given to 7 segment display. Here we are using common anode 7 segment display. Before that we have connected registers to protect the common anode display. So here you can see as it is a common anode all the anodes are connected to plus VCC or plus 5 volt. So let us design this BCD to 7 segment converter in a simulator. So we can observe how a BCD to 7 segment converter works. So again choosing a schematic capture then placing proper components. So here we require 7447 which is a decoder or driver IC. So let us place it at a proper position. Let us choose another component. So we require a 7 segment display which is a common anode. So we have to use a common anode 7 segment display and you can choose a particular color. Here we are choosing red color so red 7 segment common anode. Let us place at a proper position. Then we require logic states as we have to give 4 inputs ABCD. So we require 4 logic state inputs for ABCD. So again placing it at a proper position and again we require 3 more logic state inputs which are for control inputs as we have already discussed. We have 3 control inputs as LT, RBI and RBO. We require here supply plus 5 volt supply. So let us give names to all these logic state inputs ABCD going into the edit component. We can give the name here. Now let us make connections here. So choosing a wire we can make the connections. So we are connecting ABCD to the ABCD of the driver IC 7447. So it is very easy to simulate a circuit through a protein software because we have schematic of each and every component in this software. And then let us connect these control inputs to the RBI, RBO and LT. Now let us make connections from decoder or driver IC to same assembly display. This is also very simple. There are 7 connect points we have to connect. After connecting we can just simulate. Before that let us make all the inputs at 00, BCD input 00. And let us make LT, RBI and RBO to 1 for a normal operation. Let us give 5 volt to supply common anode. And we can start the simulation from the start button. So here you can see as 00 inputs are there it is glowing 0. So D is MSB and A is LSB. So when we click on the A so it is showing us 1 then 0010, 2 then 3. And when C is 1 so it is giving us 4 and when it is 0110 it is showing 0 and 111 and so on. So when we make a D as a 1 it will show 8 and 10019. So when we make a LT here 0 so it will it is used for the lamp test. So it will glow all the segments. So when it is BI which is 0 it will show a blank output. So these are references. Thank you.