Interfacing 16x2 LCD with 8051

Interfacing 16×2 LCD with 8051

       LCD display is an inevitable part in almost all embedded projects and this article is about interfacing 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, display for music players etc etc. Thoroughly going through this article will make you able to display any text (including the extended characters) on any part of the 16×2 display screen. In order to understand the interfacing first you have to know about the 16×2 LCD module.

Interfacing DC Motor to 8051

Interfacing DC Motor to 8051

       This article shows how to interface a DC motor to an 8051 microcontroller. Interfacing DC motor to 8051 forms an essential part in designing embedded robotic projects. A well designed 8051-DC motor system has essentially two parts. Firstly an 8051 with the required software to control the motor and secondly a suitable driver circuit. Most of the DC motors have power requirements well out of the reach of a microcontroller and more over the voltage spikes produced while reversing the direction of rotation could easily damage the microcontroller. So it is not wise to connect a DC motor directly to the microcontroller. The perfect solution is to use a motor driver circuit in between the microcontroller and the DC motor.

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 - 1.2

Lecture 1 - Background and Power Supply

Page 2

There are some down sides to a protection diode:

• All diodes have a voltage drop, meaning 9V on one side will drop to about 8.5V on the other. So your 9V wall wart just became 8.5V.
• Diodes have a current rating. If you try to suck 1A (1 amp) through a 0.1A (one hundred mili-amp) rated diode, the diode will quickly heat up and fail. For reverse protection, we recommend a 1A 1N4001 diode. These are dirt cheap and very common.

Vehicle Tracking System

VEHICLE TRACKING SYSTEM

Vehicle Tracking system using GPS module and GSM modem,  and ARM7 (LPC2129).

WORKING PRINCIPLE:

This project mainly works on GPS and GSM systems. Vechiel is traced by using information from satellite systems and send to GSM systems.

     

Vehicle and user are connected initially by using GSM network. User will send message to Moving vehicle for connectivity, hardware mounted on vehicle reacts to message and send conformation message to user and then if the message is valid one then GPS modem is initiated and requested for location.

Heart Rate Monitor Using Microcontroller

Heart Rate Monitor Using AT89S51

     This article is about simple heart rate monitor using 8951 microcontroller. The device sense the heart rate from fingertip using IR reflection method and displays it on a three digit seven segment display in beats per minute. The circuit has an accuracy of four beats per minute and it is very easy to use. In medical terms, the technique used here for sensing heart rate is called photoplethysmography.