IC 70LS90 DECOUNTER IC

The 74LS90 is a simple counter, i.e. it can count from 0 to 9 cyclically in its natural mode. It counts the input pulses and the output is received as a 4-bit binary number through pins QA, QB, QC and QD. The binary output is reset to 0000 at every tenth pulse and count starts from 0 again. A pulse is also generated (probably at pin 9) as it resets its output to 0000. The chip can count up to other maximum numbers and return to zero by changing the modes of 7490. These modes are set by changing the connection of reset pins R1 - R4. For ...

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Employee management system.

//Employee management system. #include<iostream.h> #include<string.h> #include<iomanip.h> #include<dos.h> #include<conio.h> #include<stdio.h> #define max 20 struct employee { char name[20]; long int code; char designation[20]; int exp; int age; }; int num; employee emp[max],tempemp[max],sortemp[max],sortemp1[max]; void main() { clrscr(); void build(); void list(); void insert(); void deletes(); void edit(); void search(); void sort(); char option; void menu(); menu(); while((option=cin.get())!='q') { switch(option) { case ...

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Circular Convolution of two Sequences

MATLAB CODE:- clc close all clear all x=input('Enter the sequence x:'); h=input('Enter the sequence h:'); subplot(3,1,1); stem(x); xlabel('--->n'); ylabel('Amp'); legend('Input Sequence'); subplot(3,1,2); stem(h); xlabel('--->'); ylabel('Amp'); legend('Impulse Responce'); lx=length(x); lh=length(h); l=max(lx,lh); x=[x,zeros(1,l-lx)]; h=[h,zeros(1,l-lh)]; H=zeros(l,l); H(1:lh,1)=h; for j=1:l-1     for i=1:l-1         H(i+1,j+1)=H(i,j);     end         ...

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