Tentuts-Meritox

Knowledge of sensors are very essential part of robotics.And IR sensor  is very useful if you are tying to make a obstacle avoider robot or a line follower. In this post we are going to make a simple IR sensor which can detect a object around 6-7 cm. or you can change range of sensor to 1-2 cm if you are using for line follower.

In this tutorial we will talk about Types of Memory, RAM, bit addressable RAM and how to use it. then we will cover  8051 data type and assembler directive, need of directives and their effect on program. And  how to use them in program with the help of some short program.

Register are the most important part of microcontroller so it is necessary  to understand  different type of registers of microcontroller and their work. the registers of microcontroller can be a general purpose register or a special function register ( SRF ). special function register control  special functionality of 8051 microcontroller like input/ouput port, serial port, timer, interrupt etc. here we only discus only some of them which as necessary to start writing code.

In this tutorial i am going to show you how to setup your project  in Keil for 8051 (AT89s51) to simulate and debug your code. This is one of the most important tutorial for beginner who just start learning 8051. Because Keil is the best IDE to compile,debug and simulate your program.  And most of 8051 programmer you this tool so you get lot of help about this on internet. In this tutorial i use Keil v4.0 but it is same for all version or you can download lates trail version from here

Multiplexing is very essential part while working with 8051 because of its limited number of ports. which offer 32 pins for connecting external devices. 32 seems large but when you working with seven segment, keypad, LCD, ADC etc. or if you project have many parts to operate simultaneously then you definitely need to multiplex some of ports.

  finding some parts in multisim is really tough work because multisim  not provide all general purpose component like 7085 and other voltage regulator. one more  bad information is that manufacturer of these component also not provide any PSPICE because output of these component are predetermined and not changed according to the circuit.

Today's many mobile comes with GPS Global Positioning System, but the question comes in mind that how it works and how they calculate the position accurately without sending any data to satellite, lets understand the concept and working of GPS Global Positioning System satellites transmit signals to equipment on the ground. GPS receivers passively receive satellite signals; they do not transmit. GPS receivers require an unobstructed view of the sky, so they are used only outdoors and they often do not perform well within forested areas or near tall buildings. GPS operations depend on a very accurate time reference, which is provided by atomic clocks at the U.S. Naval Observatory. Each GPS satellite has atomic clocks on board. GPS constellation     Each GPS satellite transmits data that indicates its location and the current time. All GPS satellites synchronize operations so that these repeating signals are transmitted at the same instant. The signal...