http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2009-01-08T11:05:32-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 http://www.8051projects.net/forum-t13646.html 2009-01-08T11:05:32-08:00 Hi there, the other day I built a temperature sensor using AT89S51 and ADC0844, but then the temperature display fluctuating result (about a certain value). Because, I took each reading (from ADC) and then displays it. I thought this is the hardware problem i.e. lack of signal conditioning circuitry or etc.Then, I got this idea from my lecturer to do averaging.So, what I did was took 255 readings, sum them up and divide by 255. The result then is displayed. Now, the result is steady and not fluctuating.Note that to sum up 255 8-bits data would produce 16-bit result. So, this require 16-bit addition operation for the 8051.I also used 16-bit division to divide the sum by 255d (FFh) to get the average.Just my 2 cents http://www.8051projects.net/forum-t13646.html 2009-01-08T11:05:32-08:00 shyam hi freddy!!!gr8 thinking...also referhttp://www.8051projects.net/forum-t7667-post.htmlhttp://www.8051projects.net/lofiversion/t5070/c8051-adc-in-c--programming.html