A resistor - or more correctly, a fixed resistor - is a passive component, which impedes the flow of current through an electrical circuit. A resistor is measured in Ohms and comes in a wide variety of values - from zero Ohms to several Mega Ohms. The size of the resistor varies depending on the … [Read more...]
Ohm’s law serves as the simplest method to measure electric current and also monitor it. It states that the voltage across a resistor is directly proportional to the current passing through it. This resistor based current sensing phenomena is quite easy to apply across a variety of electrical … [Read more...]
Electrochemical double-layer capacitors, also known as supercapacitors or ultracapacitors,are electrical storage devices, which have a relatively high energy storage density simultaneously with a high power density.These capacitors are used in applications reserved for batteries. The supercapacitor … [Read more...]
What is an Amplifier? A device which is used to increase the power of a signal by use of an external energy source is a Amplifier. Almost every electronic device contains at least one stage of amplification, so you will be seeing amplifiers in many devices that you work on. CLASSIFICATION OF … [Read more...]
POTENTIOMETER A potentiometer is a manually adjustable electrical resistor that uses three terminals. It is a simple electro-mechanical transducer. It converts rotary or linear motion from the operator into a change of resistance, and this change is used to control the levels of output. It is … [Read more...]
PHOTORESISTOR or LIGHT DEPENDENT RESISTOR A Light Dependent Resistor (LDR) is a small, round semiconductor device which has a resistance which varies according to the amount of light falling on its surface. Light dependent resistors are used to re-charge a light during different changes in the … [Read more...]
THERMISTOR A thermistor is a temperature-sensing element composed of semiconductor material which exhibits a large change in resistance proportional to a small change in temperature or simply Thermistors are temperature sensitive resistors. CONSTRUCTION DETAILS They are made up of a … [Read more...]
HUB A hub is a small rectangular box, often made of plastic, that receives its power from an ordinary wall outlet. A hub joins multiple computers (or other network devices) together to form a single network segment. On this network segment, all computers can communicate directly with each other. … [Read more...]
ROUTER A hardware device designed to take incoming packets, analyzing the packets and then directing them to the appropriate locations, moving the packets to another network, converting the packets to be moved across a different network interface, dropping the packets, or performing any other … [Read more...]
The OSI, or Open System Interconnection, model defines a networking framework for implementing protocols in seven layers. Control is passed from one layer to the next, starting at the application layer in one station, proceeding to the bottom layer, over the channel to the next station and back up … [Read more...]