EnrgTech

Linear regulator Linear regulators form the basic building block of power supplies used in many electronics today. Despite DC/DC converters being efficient linear regulators are a preferred choice for many designers. Linear regulators are low cost, demand few external components and there is no switching to generate noise.  Linear regulator  chips are compact, reliable and are readily available. There are many suppliers out there that manufacture theses chips and many online vendors that stock them. When used in the right application, linear regulators can be a great choice. How linear regulators work Linear regulators utilize a closed feedback loop to bias a pass element so as to maintain a constant voltage across its output terminals.  It operates a bipolar or a field effect power transistor (FET) in its linear mode. The transistor plays the role of a variable resistor in series with output load. Above is an example of an implementation of a linear regulator.  In order to

Wireless Sensor Networks A wireless sensor network (WSN) is a group of specialized transducers which use  sensors  placed in diverse locations to monitor physical conditions. A WSN system is composed of multiple sensor nodes that are small and light hence portable. Each system is a has a gateway that provides wireless connectivity back to the wired world and amongst the nodes. There are numerous wireless protocols that can be used with WSN, the protocol is picked based on application requirements. Components of a sensor node Every sensor node is made up of the following Transducer Transceiver Power source Transducers Commonly monitored parameters include pressure, humidity, temperature, chemical concentrations, wind speed and direction, sound intensity, pollutant levels, power-line voltage, illumination intensity and some body functions. Transducers that can convert energy from one form to another are required to sense these parameters and convert them to another