Tentuts-Meritox

LCDs are most common part of our day to day life. we can see it in computer, laptops, digital clocks, mobiles and many other electronics devices. LCDs are common because they offer some real advantages over other display technologies. They are thinner and lighter and draw much less power than cathode ray tubes (CRTs)

In our last tutorial we interface 2x16 LCD with 8051 in assembly, now lets display some scrolling text on LCD. it is very useful because generally we have a long text to display and a 2x16 LCD display only 16 character at a time.

In many projects circuits IC's CD4017, CD4026, CD4026 CD4511 etc are used. they all are comes under 4000 ICs series which is a CMOS (complimentary metal oxide semiconductor) based ICs. it is widely used in instruments, projects.. because it have low power consumption (µW) , drive up to 50 CMOS, 74HC, 74HTC inputs and operated between 3 to 15V power supply range.some most common ICs are listed here with pin diagram and description and their uses.

counters are used in most of all digital devices like digital clock, camera, CD/DVD recorder, mobiles etc. to count sequence in the form of pulse. and many project required a counter for counting sequence according to need of project. So in this part we are going to make a Decade Counter using CD4017 IC

Liquid Crystal Display also called as LCD is very helpful in providing user interface as well as for debugging purpose. The most common type of LCD controller is HITACHI 44780 which provides a simple interface between the controller & an LCD.  

Multisim is best simulator for electronics circuits and MCU devices with high accuracy. but there is a problem for microcontroller with mutisim, that is they  not give any user manual for 8051 with c language. this post give a basic idea how to use c language in multisim for 805x mcu devices.