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.

Interfacing ADC0804 with AT89s52

    Today in this tutorial we will learn to interface ADC0804 with AT89s52 (a microcontroller from 8051 family). ADC0804 uses successive approximation for analog to digital conversion. If you are interested to know how successive approximation works or if you don't know about working principle of successive approximation method of conversion from analog to digital signal,I recommend you to read the post on successive approximation ADC.

Successive Approximation ADC

    Today in this paper we will be understanding how an successive approximation ADC works. We are learning this basic working principle because sooner we will be dealing on how to interface an analog to digital converter with AT89s52 microcontroller. And because most of analog to digital converter uses successive approximation analog to digital conversion method for conversion of analog signal to digital signal it is important to understand successive approximation method of digital conversion before interfacing an analog to digital converter with any microcontrollers.

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.