The Story of PN Junction Diode

jojo August 27, 2013 7 Comments
I am really excited by the amazing comments & responses I got for my two articles on PN Junction. If you have not read them yet, here they are – 1) Understanding the PN Juction and 2) PN Junction...
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Breathalyzer circuit using 8051

admin March 12, 2014 15 Comments
Alcohol Breathalyzer circuit using 8051 microcontroller (AT89S51). This article is about a breathalyzer circuit using 8051 microcontroller which outputs the blood alcohol content (BAC) from the breath. The BAC is displayed in percentage on a 3 digit seven segment...
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VLSI Books for Beginners

john November 2, 2017 4 Comments
Very Large Scale Integration (VLSI), is a very vast domain and is known to be the best and most sought after field among all branches in electronics. Our idea is to bring in the basic knowledge on VLSI to...
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Heart rate monitor using 8051

admin October 31, 2017 82 Comments
This article is about a simple heart rate monitor using 8051 microcontroller. Like the previous 8051 projects, AT89S51 is the microcontroller used here. The device senses the heart rate from the finger tip using IR reflection method and displays...
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Interfacing hex keypad to 8051

admin March 8, 2013 13 Comments
This article is about interfacing a hex key pad to 8051 microcontroller. A clear knowledge on interfacing hex key pad to 8051 is  very essential  while designing embedded system projects which requires character or numeric input or both. For...
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Ultrasonic range finder using 8051

admin October 31, 2017 84 Comments
Ultrasonic range finder using 8051 . A simple ultrasonic range finder using 8051 microcontroller is presented in this article. This ultrasonic rangefinder can measure distances up to  2.5 meters at an accuracy of 1 centi meter. AT89s51 microcontroller and...
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Digital tachometer using 8051

admin April 20, 2015 39 Comments
Contactless digital tachometer using 8051. A three digit contact less digital tachometer using 8051 microcontroller which can be used for measuring the revolutions/second of a rotating wheel, disc, shaft or anything like that is introduced in this project. The...
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PWM lamp dimmer using NE555

admin January 22, 2014 20 Comments
PWM lamp dimmer. A simple and efficient PWM lamp dimmer using timer IC NE555 is discussed in this article. Yesterdays linear regulator based dimmers can only attain a maximum efficiency  of 50% and are far inferior when compared to...
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Simple audio circuits

jojo December 2, 2012 9 Comments
This article is a compilation of the simple and popular audio circuits we have published over years in CircuitsToday. This list involves a collection of simple amplifier circuits that you can try at home and some other audio related...
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Understanding the PN Junction

jojo July 21, 2014 30 Comments
Whenever someone decides to learn electronics, the first question that comes to his mind may be – “Where shall I begin?“. I would say, one shall begin at a junction 😉 the “pn junction“. We know semiconductor devices like...
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Delay using 8051 timer

admin November 28, 2012 9 Comments
Delay using 8051 timer.  The 8051 microcontroller has two independent 16 bit up counting timers named Timer 0 and Timer 1 and this article is about generating time delays using the 8051 timers. Generating delay using pure software loops...
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How to debug in Keil Microvision

Nilay Banker November 21, 2012 4 Comments
In this article we will take a look at Debugging feature of Keil uVision. In Previous Article we had seen how to create project, hex file and building Project. Once you build your project and if you see 0 errors...
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Getting Started with Keil uVision

Nilay Banker November 4, 2012 21 Comments
An Introduction to Keil MicroVision Embedded system means some combination of computer hardware and programmable software which is specially designed for a particular task like  displaying message on LCD. If you are still wondering about an embedded system, just...
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Digital thermometer using 8051

admin December 13, 2012 29 Comments
Thermometer using 8051. This article is about a simple 0-100°C digital thermometer with 1°C resolution using 8051. The circuit is based on LM35 analog temperature sensor, ADC0804 and AT89S51 microcontroller. LM35 is an analogue temperature sensor IC which can...
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Most Popular Electronic Circuits

jojo August 22, 2017 3 Comments
In this article we are attempting to list the most popular electronic circuits we have published over the last couple of years.  We know, its a little difficult task! First hurdle to cross is selecting the criteria to decide...
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Voltmeter using 8051

admin October 4, 2012 14 Comments
Voltmeter using 8051. A simple 0-5V voltmeter using 8051 is shown in this article. This digital voltmeter has a sensitivity of  200mV which is a bit low but this project is meant for demonstrating how an ADC and seven...
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