In this tutorial I am going to teach you about resistors, their usage and functionality, types of resistors and how to read their color code. In addition to that I am also going to show you a very basic and simple circuit to practically explain resistor’s functionality. I am writing this article for beginners and those people who are new into electronics. If you have never successfully understood a resistor’s functionality then here is your chance, read this tutorial from start to end and I am pretty sure even the most novice electronics student will fully understand resistor’s functionality and won’t forget it in one’s lifetime. Read the rest of this entry »
Computer and internet have made our lives much easier but at the same time they also alters our natural routine behavior. Nowadays, it became a common habit to search internet for every piece of information we need. An information for which our brain had to search into its depth memory is readily available at a single click, resultantly we use our brains less than we used to in past.
An average computer user is forced to increasing his computer memory each year to overcome his needs. Do you know that the first Read the rest of this entry »
7805 is an easy to use voltage regulator IC which output 5 volts and 1A max. It takes an unregulated voltage input which can be fluctuating within its input limits and converts this fluctuating voltage input into a perfectly regulated 5 volts power output. For example, a 12 volt lead acid battery when fully charged gives out approximately 12.70 volts and when fully discharged, it gives out 10.50 volts. This difference can be even more under load or under charging state. If we use this battery as an input source for Read the rest of this entry »
7812 is a famous IC which is being widely used in 12V voltage regulator circuits. Truly speaking it is a complete standalone voltage regulator. We only need to use two capacitors, one on the input and second one on the output of 7812 in order to achieve clean voltage output and even these capacitors are optional to use. To achieve 12V 1A current, 7812 should be mounted on a good heatsink plate. Thanks to the transistor like shape of 7812 which makes it easy to mount Read the rest of this entry »
Laptop computers are becoming necessity for those people who remain on travel. Secondly, there are some countries where power outages or load shedding is common and therefore people use laptops more often to avoid data loses and to keep working during power outages or load shedding. In either case, it is very important to increase laptop battery life especially when you don’t have access to power for long intervals and you cannot charge your laptop.
I have an IBM laptop which had a battery backup time of 2 hours and 10 minutes. This battery backup time was very short for me therefore I have done some experiments to increase this battery time and surprisingly Read the rest of this entry »