Working with LEDs

light emitting diodesLight Emitting Diodes are devices that are mostly used as indicators and for lighting purposes ,and that,just because they can emit light!In this article we cover what they are and go through different scenarios of using those versatile devices.The goal is to show that the simple and yet powerful basic concepts of electronics covered so far can be used to realistic and meaningful ends.Enough talk,lets get our hands dirty!Continue reading

Series-parallel circuits.

series parallel circuitsWe already have a considerable amount of information about circuit configurations.We can build and analyze Series and Parallel circuits. In this article we analyze a more practical configuration you are most likely to run into in your daily life as an electric circuit designer, implementator and troubleshooter.Ladies and gentlemen let me introduce you to the Series-Parallel circuit configuration!Continue reading

Series circuits.

series circuit

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In a previous article on Ohm’s Law,we have made clear the relationship between voltage,current and resistance . In this article,we want to scale up;not just use ohm’s law to analyze a single resistor circuit but to attack circuits with even multiple resistors.Resistors are connected in very interestingContinue reading

Energy and power.

Energy and powerEnergy is defined as the ability to do work.There are many ways we can make sense of this statement.For example,when current passes through a resistor,heat is generated.This heat can be used in winter to heat up our rooms ,or in our kitchens for cooking purposes;this is work being done !Continue reading

Lab apparatus and circuit measurements;the basics.

electronics measurementThis post has a concept enforcing video ,click here to access it.

Any practicing electronics technician has a certain amount of apparatus he has to deal with on a daily basis.These include : a DC power supply,a voltmeter,an ammeter,an ohmmeter,a digital or analog oscilloscope,a function generator and many others.Some manufacturers may combine multiple functions inside one device;a good example of this is a multimeter which supports itself the functions of the ammeter,the ohmmeter and the voltmeter.In this article we cover devices that measure the quantities we have already covered in previous articlesContinue reading

Ohm’s Law.

This post has concept enforcing videos.Click here(Users outside China) or here(Users in China) to check them out.

Ohm’s law gives us a way to mathematically relate voltage,current and resistance.This is important since it allows us to determine an unknown quantity from those we already know or can easily measure. Ohm’s law states thatContinue reading

Voltage,Current and Resistance.

Voltage imageThis post has concept enforcing videos!Click here(Users outside China) or here (Users in China) to check them out.

Voltage,current and resistance are basic quantities in all electrical circuits.To get off on the right foot in this series of circuit analysis,we have to make sure these concepts are nailed down.And …,nailed tight!Continue reading

How do I understand my Electronics course.

Electronic components - Resistor and capacitorThe first time I came in contact with electronics, I was at high school . We dealt with devices such as simple dc motors,electric lights and teachers told us it was a combination of these basic devices and many others that made possible the construction of the more advanced and sophisticated devices that we have got so dependent on in our daily lives.

I was always amazed at how electronics could do so many things ,and wondered ifContinue reading