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Monday 10 March 2014

MATLAB Projects-6

differential amplifier using opamp


differential amplifier using opamp is designed and the opamp is an non-inverting amplifier.this is used to 

make the output as the difference of the two inputs using an opamp

click on the following link to download the matlab file

differentialamplifier


MATLAB Projects-5

instrumentation amplifier


the circuit that is used in the data acquisition, medical instrumentation, current/voltage monitoring etc., is 

instrumentation amplifier and it is built by using the operational amplifier


click on the following link to download the matlab file

instrumentation amplifier

MATLAB Projects- 4

adder using opamp


adder using opamp. this adds the inputs and gives the added one as output.


click on the following link to download the matlab file

adder using opamp


MATLAB Project-3

adder using opamp with negative gain


adder using opamp. this adds the inputs and gives the added one as output. the negative gain here indicates 

the positive output.

click on the following link to download the matlab file


adder using opamp with negative gain


Sunday 9 March 2014

MATLAB Project-2


NON- INVERTING AMPLIFIER

this circuit enables us to amplify the voltage level from one level to other. both the dc and ac can be used as 

supply

click on the following link to download the matlab file

NON INVERTING AMPLIFIER USING MATLAB


MATLAB Projects-1

INVERTING AMPLIFIER

the inverting amplifier using op-amp is implemented in matlab and is copyrighted.

this circuit enables us to amplify the voltage level from one level to other. both the dc and ac can 

 be used as supply.

click on the following link to download the matlab file

inverting amplifier using opamp


Friday 7 March 2014

Electric shock – What should I do?



What to do if you believe someone has had, or is getting, an electric shock
It may not be immediately clear that someone is getting an electric shock. Smoke won’t be pouring from their ears! If you think someone is suffering from electric shock, approach with extreme caution.
The first step is to separate the person from the source of electricity as quickly as possibly. The best way of doing this is to turn off the supply, for example by unplugging the appliance or by turning the mains off at the fusebox (consumer unit).
If this isn’t possible, then try to remove the source of electricity from the person using a piece of insulating material, such as a length of wood.
NEVER touch the person receiving the electric shock, or you could suffer one too.
After removing the person from the source of electricity, if the person is unconscious call for an ambulance immediately. Only those with the necessary knowledge and skill should carry out first aid.
Where the person is conscious and seems well, it is still advisable to monitor their condition, as the effects of an electric shock may not be immediately obvious. In worst case conditions, an electric shock may lead to a condition known as electroporation, where cells within the body rupture, leading to tissue death. Additional problems might include deep-seated burns, muscle damage and broken bones.
Use an RCD. Using an RCD will help to protect you from dangerous electric shocks. Although not a guarantee of absolute safety, it limits the time current can flow through the body if a person comes into contact with a live source of electricity.
We strongly recommend that anyone using electrical appliances in the garden ensures that they are protected by an RCD, preferably one fitted in the main household fusebox (consumer unit).
Alternatively, a dedicated RCD-protected socket or a plug-in RCD should be used

Safety tips around the home


You can reduce the risk of electric shock in your home by taking a few precautions, including:
Always hire a licensed electrician for all wiring jobs.
Don’t use extension leads or appliances if the cords are damaged or frayed.
Don’t remove a plug from a power point by pulling on the cord – pull the plug instead.
Keep electrical appliances away from wet areas.
Have safety switches installed by an electrician.
Buy portable power boards with built-in safety switches.
Insert safety plugs into power points not in use to stop children from inserting objects into them.


How to help a victim of electric shock



The first thing you must do is disconnect the power supply. Don’t even touch the victim until you are sure that the power supply is turned off. Be especially careful in wet areas, such as bathrooms, as water conducts electricity. It may be safer to turn off the electricity supply to the building if possible to be absolutely sure.

First aid for electrical shock includes:
Check for a person’s response and breathing. It may be necessary to commence cardiopulmonary resuscitation (CPR).
Call 108 for an ambulance. If you are unsure of resuscitation techniques, the ambulance call-taker will give you easy-to-follow instructions over the telephone, so you can increase the person’s chances of survival until the ambulance arrives.
If their breathing is steady and they are responsive, attend to their injuries. Cool the burns with cool running water for 20 minutes and cover with dressings, if available, that won’t stick. Simple cling wrap found in most kitchens is very suitable to cover burns as long as it is not applied tightly. Never put ointments or oils onto burns. If the person has fallen from a height, try not to move them unnecessarily in case they have spinal injuries. Only move them if there is a chance of further danger from the environment (such as falling objects).
Talk calmly and reassuringly to the person.



Causes of electric shock



Some of the causes of electric shock include:
  • Faulty appliances
  • Damaged or frayed cords or extension leads
  • Electrical appliances coming in contact with water
  • Incorrect or deteriorated household wiring
  • Downed powerlines
  • Lightning strike.
  •  

Symptoms of electric shock



The typical symptoms of an electric shock include:
  • Unconsciousness
  • Difficulties in breathing or no breathing at all
  • A weak, erratic pulse or no pulse at all
  • Burns, particularly entrance and exit burns (where the electricity entered and left the body)
  • Sudden onset of cardiac arrest.


Sometimes victims of electric shock may appear to be unhurt, but they should still be treated as a victim of electric shock. Some injuries and further complications may not yet be obvious. An examination in hospital is important after any electric shock.

electric shock

Electric shock can cause injuries including burns and disturbances to heart rhythm (heart failure) that could be fatal. Always disconnect the power supply before trying to help a victim of electric shock. Be especially careful in wet areas and around downed powerlines. A safety switch can reduce the risk of electric shock in the home.

The human body conducts electricity. If any part of the body receives an electric shock, the electricity will flow through the tissues with little obstruction.

Depending on the length and severity of the shock, injuries can include:
Burns to the skin
Burns to internal tissues
Electrical interference or damage (or both) to the heart, which could cause the heart to stop or beat erratically.

Always disconnect the power supply before trying to help a victim of electric shock.

Trainee Teachers at VNIT

Eligibility : BEd, B.Arch, M Phil / Phd, BE/B.Tech
Location : Nagpur
Last Date : 18 Mar 2014

HOW TO APPLY:
Application in the prescribed format completed in all respects alongwith true copies of relevant testimonials, certificates should reach to “The Registrar, South Ambazari Road, Visvesvaraya National Institute of Technology, Nagpur – 440010” on or before 18/03/2014. 

management trainee at Coal India Limited

Eligibility : CA, ICWA, PG Diploma, MBA/PGDM, BE/B.Tech
Location : Kolkata
Last Date : 14 Apr 2014

Tuesday 4 March 2014

TIFR Recruitment 2014 – Junior Research Fellow (JRF)

educational qualification: B.E/B.Tech

selection procedure : screening and interview

last date : 05-03-2014

click here for  application form

SSC Junior Engineer 2014 Notification

SC Junior Engineer 2014 Important Dates:

Starting Date for Online Registration: 01-03-2014
Last Date for Online Registration (Part - I): 26-03-2014
Last Date for Receipt of Application Form (Part – II): 28-03-2014
Last Date for Receipt of Application for Far flung areas (Part – I): 02-04-2014
Last Date for Receipt of Application for Far flung areas (Part – II): 04-04-2014
SSC Junior Engineer Written Examination: 25-05-2014

click here for advt

click here to apply