Journal of Multidisciplinary Engineering Science and Technology (JMEST) ISSN: 2458-9403 Vol. 3 Issue 4, April - 2016 www.jmest.org JMESTN42351519 4569 Design And Development Of An External Cardiac Defibrillator Using The Fly Back Transformer 1 A.H.M Iftekharul Ferdous, 2 Arif Mohammad Faisal, 3 Shahriar Mahbub, 4 Rafiul Abdussami, 5 Syed Fardeen Hashmey 1 Dept. of EEE, Pabna University of Science and Technology 2,3,4,5 Dept. of EEE, Islamic University of Technology Pabna, Bangladesh digonto_eee3@yahoo.com Abstract—Defibrillators are devices that are used to apply a large electric shock to the heart and restore a normal sinus rhythm to a heart which is still active but not contracting in a coordinated fashion. The use of a defibrillator on a patient following a heart attack is an emergency procedure, as the pumping action of the heart has to be restarted within a few minutes if the patient is to survive. A century has passed since the defibrillator has been invented. But it is matter of shame that yet this simple technology failed to reach all the class of people around the world which could save a lot of lives .This paper deals with the design a defibrillator by using flyback transformer and high voltage capacitor to generate the required triggering pulse. So,we model a defibrillators by preparing a circuit which costs much lower than the available one. Keywords—Defibrillator, Fly Back transformer, High voltage capacitor 1.Introduction Defibrillator is used for the treatment of fibrillation (an arrhythmia of heart). The technology of defibrillation was invented more than a century ago and it’s more than half a century since it’s been used on human being. Almost all the industries and public places of the developed countries keep Automated External Defibrillators (AEDs). This technology has advanced to such a stage that wearable and implantable defibrillators are used at a frequent rate by the patient of the developed countries. But like many other inventions of science this invention also failed to reach all the people around the world. In the third world countries yet there are hospitals where there is not a single external defibrillator which could have saved a lot of lives. Coronary Heart Disease Deaths in Bangladesh is 163,769 or 17.11% of total deaths (WHO, April 2011). This death rate ranks Bangladesh 25 in the world. Price of defibrillators imported to Bangladesh varies from 3 lakhs to 15 lakhs or more. So most often government hospitals and private clinics cannot afford to keep sufficient defibrillators. Again once these devices start malfunctioning they cannot be repaired locally. Sometimes device warranty also doesn’t work out. People of the remote areas, attacked by fibrillation die long before reaching the town hospitals. Every minute passes, the chance of a patient attacked by fibrillation coming back to life decreases. A defibrillator at the union health complex could have changed the picture. 1.1 Fly Back Transformer: Fly back transformers are relatively used to Generate high voltage in high frequency. The design cost is comparably lower than other high voltage transformers. These types of transformers are very reliable and efficient to generate high voltage. It is used extensively in switched mode power supplies for both low (3V) and high voltage (over 10 kV) supplies. Figure 1.1: Flyback Transformer Figure 1.2: A typical TV flyback transformer