Why Use Prepaid Phone Cards?

Making calls locally and internationally remain to be very important. Calls are made every day, whenever you have a need to keep in touch with your friends or family, to make important business calls, to place orders or to make important enquiries. Everyone desires to have a smooth conversation from beginning to end, whether for…

The 555 Timer IC

The 555 timer IC is an incredibly useful timer that can act as either a timer or an oscillator. In timer mode, better known as monostable mode, the 555 simply acts as a “one-shot” timer; when a trigger voltage is applied to its trigger lead, the chip's output goes from low to high for a…

Metal Oxide Semiconductor Field-Effect Transistors

Metal oxide semiconductor field-effect transistors (MOSFETs) are incredibly popular transistors that in some ways resemblance JFETs. For instance, when a small voltage is applied at its gate lead, the current flow through its drain-source channel is altered. However, unlike JFETS, MOSFETs have larger gate lead input impedances (11014,, as compared with 109 for for JFETs),…

Future Communications of Mankind

Communication could be defined as passing information from one location to the other. We humans are good at communications because we developed a better tool than all other organizations on earth. That tool is language. We created languages. Languages ​​are nothing more than organized signals of messaging. Animals use sound systems but they do not…

Impedance Matching and Unmatched Impedances

Impedance Matching Since a transmission line has impedance built in, the natural question to ask is, how does the impedance affect signals that are transmitted through a transmission line from one device to another? The answer to this question ultimately depends on the impedance of the devices to which the transmission line is attached. If…

Kinds of Capacitors

There are a number of different capacitor families available, each of which has defining characteristic features. Some families are good for storing large amounts of charge yet may have high leakage currents and bad tolerances. Other families may have great tolerances and low leakage currents but may not have the ability to store large amounts…

Things to Know About Diodes

Diodes come in many shapes and sizes. High-current diodes are often mounted on a heat-sink device to reduce their operating temperature. It is possible to place diodes in parallel to increase the current-carrying capacity, but the VI characteristics of both diodes must be closely matched to ensure that current divides evenly (although a small resistor…

Op Amp Specifications

Common-mode rejection ratio (CMRR): The input to a difference amplifier, in general, contains two components: a common-mode and a difference-mode signal. The common-mode signal voltage is the average of the two inputs, whereas the difference-mode signal is the difference between the two inputs. Ideally, an amplifier affects the difference-mode signals only. However, the common-mode signal…

Tips To Create A Great Whatsapp Status

Whatsapp is a messenger application that has become very popular not just amongst youngsters but also among adults because it makes it easy for people to chat and keep in touch. Perhaps the major reason as to why this mobile platform is loved is because messages can be changed across all operating systems and all…