Archive for the ‘Tutorials’ Category

How to desolder electronic connections

Learn how to de-solder electronic connections from the above video. He explains in the video how to remove the solder using a soldering iron alone, then using a desolder machine. He also explains the way of removing complex & thick solders using a combined action of soldering irons heat & a desolder. Usually a combined effort is always necessary in getting the apt result.

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How a LED works – Light Emitting Diode working

Watch the video given below to get a better idea on how LED works?  A light emitting diode (LED) is known to be one of the best optoelectronic devices out of the lot. The device is capable of emitting a fairly narrow bandwidth of visible or invisible light when its internal diode junction attains a forward electric current or voltage. The visible lights that an LED emits are usually orange, red, yellow, or green. The invisible light includes the infrared light. The biggest advantage of this device is its high power to light conversion efficiency. That is, the efficiency is…

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Using inverters with AC generators.

Generator with Inverters. Inverter systems can be in-corporated with generator systems to attain longer run-time when there is a cut in the mains power supply.The essential and critical loads require undisturbed power supply when the mains AC power supply falls for extended periods.The inverter can be used to power the critical and essential loads when the power supply fails.The generator can be started automatically or manually when the power cut extends for longer periods and the inverter battery becomes exhausted.In such a condition the inverter alone cannot provide necessary to the loads. Instead of drawing power from the battery,the inverter…

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How the GSM system works?.

GSM. In various countries the frequency bandwidths specified for the GSM services are GSM-400, GSM-800, GSM-900, GSM-1800 and GSM-R.The GSM-900 and the GSM-1800 are the most widely used frequency bandwidths in different parts of the globe. The GSM-900 has a down link frequency range of 935-960 MHz and an up link frequency of range of 895-915 MHz. This frequency band is partitioned into 124 pairs of simplex channels with separation of 200KHz.A particular range of simplex channels is given to a particular network provider. The type of interface used in GSM is digital air interface.The analogue voice signals are converted…

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Introduction to PWM Inverters.

PWM Inverters. Now a days most of the inverters available in the market utilizes the PWM(Pulse Width Modulation) technology.The inverters based on PWM technology are superior in many factors compared to other inverters designed using conventional technologies. The PWM based inverters generally use MOSFETs in the output switching stage.In such cases the inverters are generally termed as PWM MOSFET inverters.The inverters based on PWM technology has a lot of protection and control circuits compared to the traditional inverters. —————————————————————————————-   What is PWM technology? & Why PWM is used?. PWM or Pulse width Modulation is used to keep the output…

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How an Inverter works.

Inverter. An inverter is used to produce an un-interrupted 220V AC or 110V AC (depending on the line voltage of the particular country) supply to the device connected as the load at the output socket.The inverter gives constant AC voltage at its output socket when the AC mains power supply is not available. Lets look how the inverter makes this possible.To grasp the functioning of an inverter,we should consider in the following situations. When the AC mains power supply is available. when the AC mains power supply is not available. When the AC mains power supply is available. When the…

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Introduction to uA 741 Op-Amp

We have already discussed in detail about the basics on operational amplifier, its block diagram, symbol, different characteristics, and its circuit diagram (Refer:- Op Amps-Operational Amplifiers). In this post, we will be discussing about the 741 IC, one of the most popularly used op-amp IC. About the uA741 Op-amp IC The 741 IC was designed by Dave Fullagar of Fairchild Semiconductor in 1968. The 741 IC is the successful predecessor of the LM 101 IC, and the only difference between the two was that an additional 30pF internal compensation capacitor was added for the 741 IC. But, this simple addition…

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VOIP – an Overview

VOIP – Voice Over Internet Protocol VIOP (Voice over Internet Protocol) is a protocol used for the transmitting voice through the Internet or other packet switched networks. VoIP is often used to refer to the transmission of voice . VoIP is also known as , Internet telephony, , Broadband Phone. VOIP is pronounced as voyp. Companies providing VoIP service are commonly referred to as providers, and protocols which are used to carry voice over the network are commonly referred to as VoIP protocols. They may be viewed as commercial realizations of the experimental Network Voice Protocol implemented in 1973 for…

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