Learn VHDL programming ONLINE!!!

      To learn VHDL programming just go through these websites ...Have fun

You will get the programs too.  

1.http://esd.cs.ucr.edu/labs/tutorial/

2.http://www.asic-world.com/vhdl/tutorial.html

3.http://users.ece.gatech.edu/sudha/book/starters-guide/

Simple Temperature controller

Simple Temperature controller mini project using IC741 used as comparator!

Circuit diagram:

Above circuit consist of ic741 which is used as comparaotor.The reference temp. is given at inverting terminal of 741 which is adjusted by potentiometer so that can have the ref.temp. which you want.

Op-amp virtual ground

Op-amp virtual ground and virtual short concept

 

Logic Gates using OP-AMP

Building Logic gates using Op-amp 

1.AND gate using op-amp:circuit diagram

Check out the above circuit

At inverting input of opamp a reference voltage of 3.75 is given which is approximately 3/4th of Logic 1 i.e 5V

So that it can operate well like AND logic.

Code lock system

Code lock system:Simple project

 

 

When you make on the buttons 1,3and 6 the lock will open the relay will be driven and you can drive your load whichever is connected to the relay circuit.

Its implemented and tested in PROTEUS simulation software.

Have a fun with this simple lock system.

AM generation using MATLAB!!!

                                AM generation code for MATLAB!

%AM generation
t=0:0.001:1;
m=input('Enter modulation Index');
ms=5*sin(2*pi*5*t); %Message signal
cs=5*sin(2*pi*50*t); %Carrier signal
Am=(5+m*ms).*sin(2*pi*100*t);%AM signal
subplot(3,1,1);
plot(t,ms);
xlabel('Time');
ylabel('Amplitude');
title('Message signal');
subplot(3,1,2);
plot(t,cs);
xlabel('Time');
ylabel('Amplitude');
title('Carrier signal');
subplot(3,1,3);
plot(t,Am);
xlabel('Time');
ylabel('Amplitude');
title('AM signal');

Output:
Enter modulation Index 1

Generation of FM using MATLAB!!!

FM generation code for MATLAB!

%FM generation
t=0:0.001:1;
m=input('Enter modulation Index');
ms=5*sin(2*pi*5*t); %Message signal
cs=5*sin(2*pi*100*t); %Carrier signal
Fm=10*sin(2*pi*50*t+(m.*sin(2*pi*5*t)));%FM signal
subplot(3,1,1);
plot(t,ms);
xlabel('Time');
ylabel('Amplitude');
title('Message signal');
subplot(3,1,2);
plot(t,cs);
xlabel('Time');
ylabel('Amplitude');
title('Carrier signal');
subplot(3,1,3);
plot(t,Fm);
xlabel('Time');
ylabel('Amplitude');
title('FM signal');

Output:Enter modulation Index 5