Temperature based device Control system

A temperature based device control system which uses AT89s52 and LM35 temperature sensor is an embedded system which controls external devices(mainly an household appliances heater,fan,coolers and many more) by monitoring the temperature obtained from temperature sensor.

Line Tracking Robot using AT89s52

Previously, we discussed on line tracking robot without using microcontroller. Today, we will be building a simple line tracking robot which uses AT89s52 microcontroller that acts as control unit to provide decision to the robot. This following robot will also be able to detect cross or junction in the track.

Interfacing DS18s20 with AT89s52

In the previous post, we interfaced an analog temperature sensor i,e LM35 .Today, its time to interface DS18s20 with AT89s52 ,a microcontroller from 8051 family which is an digital temperature sensor of 9 bit resolution.

Interfacing LM35 with AT89s52

   Today, we are going to interface LM35 temperature sensor with AT89s52 microcontroller. As most of all already know that AT89s52 is a microcontroller from 8051 microcontroller family and it has no any feature of internally built analog to digital converter and since LM35 being an anlog sensor, we will require a suitable means of converting the analog signal obtained from LM35 to a discrete time signal. So, by now you must have already known that interfacing LM35 requires knowledge of interfacing analog to digital converter with AT89s52. If you donot have knowledge on interfacing analog to digital converter with AT89s52, you are recommended to read this post Interfacing ADC with AT89s52 first.

HM-TR interfacing with AT89s52

HM-TR 434 is a wireless radio frequency module with default configuration(9600,8,N,1). In this post i am going to give a tutorial on interfacing HM-TR with AT89S52 microcontroller.But first you are encouraged to read this post UART in AT89s52 / Serial communication using AT89s52.The pin configuration of this module is shown below.

GPS interfacing with AT89s52

   Today, I am going to provide a brief description on interfacing GPS receiver with AT89s52( a microcontroller from 8051 family). The GPS receiver used is GT3221R. The specification of this GPS receiver (GT3221R) can be found in the manufacturers website.Before we go to this post first it is recommended to read a post on serial communication using AT89s52. First, I will be telling how this GPS receiver works and then we will go in the process of interfacing it with AT89s52.

Interfacing PIR sensor with AT89s52

    Today,I am going to tell you about the technique of interfacing Passive Infrared Sensor (PIR) with AT89s52 MCU (a microcontroller from 8051 family) with a detailed description about this sensor. This is an easily available sensor and figure of this sensor