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 19 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 October 11, 2012 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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