Interfacing LED and push button switch to 8051

admin June 18, 2012 19 Comments

This article is all about how to interface push button switches to an 8051 microcontroller. Push button switches are widely used in embedded system projects and the knowledge about  interfacing them to  8051 is very essential in designing such projects. A typical push button switch has two active terminals that are normally open and these two terminals get internally shorted when the push button is depressed. Images of a typical pushbutton switch is shown below. Circuit diagram. The circuit diagram for...
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8051 Programming Tutorial-Chapter 1

jojo June 5, 2012 18 Comments

This article series is developed to teach you 8051 micro controller programming. I have divided this programming tutorial into a series of chapters as shown below. So you can start with Chapter 1 and then move to chapter 2 and chapter 3 and so on. So let’s begin the journey right now!  Note: Next chapters 1,2,3.. are under development phase. Please visit this page again for updates. Note: To test any of these program or to write one your...
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Interfacing 16×2 LCD with 8051

admin May 22, 2017 49 Comments

LCD display is an inevitable part in almost all embedded projects and this article is about interfacing a 16×2 LCD with 8051 microcontroller. Many guys find it hard to interface LCD module with the 8051 but the fact is that if you learn it properly, its a very easy job and by knowing it you can easily design embedded projects like digital voltmeter / ammeter, digital clock, home automation displays, status indicator display, digital code locks, digital speedometer/ odometer,...
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8 channel light chaser using 8051

admin June 5, 2012 10 Comments

6 function 8 channel light chaser using 8051. A 6 function 8 channel light chaser using 8051 is shown here. The hardware and software of this circuit are very simple and the light functions gets repeated one after another  automatically. P1.0 to P1.7  of the microcontroller (AT89S51) are assigned as the output pins. Corresponding LEDs are connected to the output pins through 1K current limiting resistors (R1 to R8). The sequence by which the output pins (P1.0 to P1.7)...
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Blinking LED using 8051

admin June 5, 2012 8 Comments

Blinking 1 LED using 8051 This is the first project regarding 8051 and of course one of the simplest, blinking LED using 8051. The microcontroller used here is AT89S51 In the circuit, push button switch S1, capacitor C3 and resistor R3 forms the reset circuitry. When S1 is pressed, voltage at the reset pin (pin9) goes high and this resets the chip. C1, C2 and X1 are related to the on chip oscillator which produces the required clock frequency....
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4 Books to Learn 8051 Microcontroller

jojo March 25, 2014 10 Comments

Hello friends, it has been a while since I published here. This article is for students and hobbyists who are interested in playing with microcontrollers. I thought of introducing you to a handful of cool and really useful books on 8051 micro controller. The books suggested have been provided with links to shopping sites to buy from USA, India and UK. #1  8051 Microcontroller-Internals,Instructions,Programming & Interfacing by Subrata Ghoshal Many of the students out there who already know about...
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