Interfacing of ADC to 8051

Interfacing of ADC to 8051

      ADC (Analog to Digital converter) forms a very essential part in many embedded  projects and this article is about interfacing an ADC to 8051 embedded controller. ADC0804 is the ADC used here and before going through the interfacing procedure, we must neatly understand how the ADC 0804 works.

Interfacing Seven Segment Display to 8051

Interfacing Seven Segment Display to 8051

        This article is about how to interface a seven segment LED display to an 8051 microcontroller. 7 segment LED display is very popular and it can display digits from 0 to 9 and quite a few characters like A, b, C, ., H, E, e, F, n, o,t,u,y, etc. Knowledge about how to interface a seven segment display to a microcontroller is very essential in designing embedded systems. A seven segment display consists of seven LEDs arranged in the form of a squarish ’8′ slightly inclined to the right and a single LED as the dot character. Different characters can be displayed by selectively glowing the required LED segments. Seven segment displays are of two types, common cathode and common anode. In common cathode type , the cathode of all LEDs are tied together to a single terminal which is usually labeled as ‘com‘ and the anode of all LEDs are left alone as individual pins labeled as a, b, c, d, e, f, g & h (or dot) . In common anode type, the anode of all LEDs are tied together as a single terminal and cathodes are left alone as individual pins. The pin out scheme and picture of a typical 7 segment LED display is shown in the image below.

Hall Management System

Abstract

              Now a days, we need halls or auditorium for our family functions, school/college functions etc. But it is difficult to manage whole hall i.e like controlling fan/ac speed, controlling temperature and light in the hall or counting visitors when visitors are more. This is a system which includes all management of a hall. By reducing manpower and our efforts.

Wall Painting Robot - Block Diagram

1. Power supply unit – It consist of 12v, 3A power supply battery. The main function of this block is to provide necessary supply to all the circuit.

2. IR sensor unit – IR sensor unit consist of IR transmitter and IR receiver. Whenever  the  obstacle  comes  in front ,the signal  is  transmitted  to transmitter  and  then  transmitter  transmit  the signal  to  receiver  and  then  this  signal  is  given  to  control  unit.

Beginning Embedded Electronics - 1.1

Lecture 1 - Background and Power Supply

Page 1

       This is a series of lectures written for those with mild electronics background (aka Sophomore in Electrical and Computer Engineering) to learn about the wild world of Embedded Electronics. I assume only that you know what electricity is and that you've touched an electrical component. Everything else is spelled out as much as possible. There is quite a lot here so take your time! It is also my intention to get book-hardened EE's students to put down the calculator and to plug in an LED. Remember, if it smokes, at least you learned what not to do next
time!

Super Flux RGB LED Controller

Introduction

      In this project it was used the Piranha Super-flux RGB Led of common anode, and the PIC18F25K20, in order to generate combinations of colors. It has two function modes, automatic that generate the color sequence that is stored in the μC memory, and the manual mode in which you can select one of the seven possible colors.

89SXX Development Board

Introduction

    There are some 89SXX development boards, here is another one. I have designed this single side development board to be used as a tool for learning MCS-51 Microcontrollers, and for easy microcontroller project development.

Programmable Home Security Alarm System

Introduction

     In this project we design low cost high performance programmable home security system. This system uses a few LDR's as input sensor. When above sensor(s) get triggered system may dial the user specified phone number (using built-in DTMF generator) and activate the high power audio alarm an lights. All the parameters of DTMF generator , audio alarm and light interface programmed through the  RS232 serial interface.

3-Phase Irrigation Water Pump Controller by GSM module for illiterates

      This project aims in providing a user friendly, reliable and automated water pumping system for illiterates. Now a day's technology is running with time, it completely occupied the life style of human beings. Even though there is such an importance for technology in our routine life there are even people whose life style are very far to this well known term technology. So it is our responsibility to design few reliable systems which can be even efficiently used by them. This basic idea gave birth to the project GSM based irrigation water pump controller for illiterates and this project aims in introducing the automation technology into the lives of the illiterates.

I2C Protocol Implementation With RTC And EEPROM

     The main aim of the project is to implement the I2C protocol by interfacing RTC and EEPROM using controller (ATmega8535).

Thermometer using Microcontroller

Introduction

• This article is about a simple 0-100°C digital thermometer using Microcontroller.
• The circuit is based on LM35 analog temperature sensor, ADC 0804 and AT89S51 microcontroller.