Wednesday, August 8, 2012
Program to Solve System Of Linear Equations With Step By Step Solution
8 comments:
Labels:
B-Tech,
C,
Mathematics,
Programming,
Projects
Four years ago when I was in my first year of B-Tech, I have written a program in C to solve for given system of linear equations. I actually wrote it for my personal use then. Once my maths lecturer gave a long assignment on solving system of linear equations. I did not feel like doing that. So, I wrote this program to solve the equations by generating a step by step solution (so that I can copy in the assignment) and also give information about all the related properties like rank of the matrix, nature of solution, etc. (If you are in a hurry, you can scroll down the page to quickly download the program)
Tuesday, July 24, 2012
Automatic Room Light Controller With Single Door Bi-Directional Visitor Counter
66 comments:
Labels:
Electronics,
Home Automation,
Projects
Automatic Room Light Controller with Single Door Bidirectional Visitor Counter is a reliable
circuit that takes over the task of counting number of persons/ visitors in the
room passing through a single door and also turns ON the room light when there
is at-least one person in the room and turns OFF when the room is empty. The
total number of persons inside the room is displayed on seven segment display. We can use any other appliance like fan or anything else instead of the light.
Watch this video to get an overview of this circuit.
Monday, June 18, 2012
Install Dropbox Before This Month Ends
No comments:
Labels:
Linux,
Software,
Windows
Dropbox, the most popular file syncing and sharing service is about to put an end to Public Folders shortly.
Sunday, June 17, 2012
Shadow Counter Circuit
9 comments:
Labels:
Electronics,
Projects
 |
| Block Diagram of Shadow Counter |
Shadow counter is a circuit which can count the number of shadows incident on it. Shadow counting is the main principle of many devices like currency note counting machines, visitor counters, many security systems , etc.
In this article i will teach you how to design a shadow counter circuit.
I have made this circuit based on Shadow Alarm by D.Mohan Kumar published in Electronics For You- January, 2006.
The block diagram of shadow counter is shown above. The intensity of light is sensed by the Light sensor. I have used a Light Dependent Resistor (LDR) as light sensor.
The comparator circuit is designed such a way that its output changes from HIGH to LOW when the shadow occurs. The output of the comparator triggers the monostable multivibrator which in-turn triggers the counter circuit. I have used µA741 Op-Amp as a comparator.
The counter circuit stores the number of shadows occurred in the past and increments the count by 1 unit when triggered. The output of the counter is given to a display using a display driver. I have used a common cathode seven segment display in my circuit.
The monostable multivibrator is used to avoid false triggering. For example, when a shadow is falling for a quite long time (a few seconds), then due to the partial shadows that may occur due to the same object, the comparator gets triggered multiple times for the same object. This increments the count many times for the shadow of only one object. Using a monostable multivibrator in between as I have done eliminates or at-least reduces that problem. I have used a 555 timer as a monostable multivibrator.
You can see the video of Shadow counter here:
The circuit is quite easy to implement. So, I encourage you to do it yourself. This circuit is basically aimed at hobbyists and is also suitable as a college project (mini project) for Electronic Engineering students.
However, I have also done the entire circuit on board along with complete documentation and presentation (PPT) of shadow counter. If you are interested in getting the circuit along with the documentation and presentation, you can contact me by clicking here.
Saturday, May 5, 2012
Combinatorial Digital Circuit Logic Determining Device
19 comments:
Labels:
Electronics,
Projects
 |
| Block Diagram Of Combinatorial Digital Logic Determining Device |
Here is my new electronics circuit for you. This is a brief description/ abstract for the project. Combinatorial digital circuit logic determining device is a circuit which determines the logic of any given combinatorial digital circuit. This is a very helpful tool to know the functionality of an unknown digital circuit. The device has probes which are plugged to the inputs and outputs of the digital circuit under test. This device then determines and displays the functionality of the circuit under test in the form of a boolean equation.
The circuit has number of probes equal to the number of inputs and outputs of the circuit under test. I have implemented it for two inputs and one output. Although, you can make slight modification of the code to make it work for as many inputs and outputs you want.
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