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 2008 Rickey's World contact@nospam.com (Ajay Bhargav) contact@nospam.com (Ajay Bhargav) Wed, 07 Jan 2009 13:20:53 -0800 Wed, 07 Jan 2009 13:20:53 -0800 http://backend.userland.com/rss e107 (http://e107.org) 60 Search 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes query http://www.8051projects.net/search.php http://www.8051projects.net/forum-t13646.html 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 ]]> Tue, 07 Oct 2008 08:06:10 -0700 http://www.8051projects.net/forum-t13646.html http://www.8051projects.net/forum-t13646.html
gr8 thinking...
also refer

http://www.8051projects.net/forum-t7667-post.html
http://www.8051projects.net/lofiversion/t5070/c8051-adc-in-c--programming.html]]> contact@nospam.com (Ajay Bhargav) Tue, 07 Oct 2008 08:18:42 -0700 http://www.8051projects.net/forum-t13646.html