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) Thu, 08 Jan 2009 22:18:45 -0800 Thu, 08 Jan 2009 22:18:45 -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-t10305.html i want to design the digital multi-meter using 8051. Can anyone help me in this regard.


Sanath
Bangalore]]> Tue, 24 Jun 2008 23:26:56 -0700 http://www.8051projects.net/forum-t10305.html http://www.8051projects.net/forum-t10305.html firstly u need to decide what all parameters u would like to measure with the multimeter (voltages/currents/ac/dc etc..). accordingly u have to decide first on the resolution of the ADC u will be interfacing to the uC. the general purpose ADC 0808 will provide u with only 8 bit i.e. 256 counts which can be translated to only 21/2 digit multimeter. To have a higher resolution u may need a better ADC (12bit or more). A common parallel ADC with 12 bit resolution is the ICL 7109.
The second part would be the display u like to interface which can be either LCD or a multiplexed 7 segment LED display.
The last ( but not the least one)part would be the analog design part where ur different inputs like current/voltage and resistance will have to be conditioned to the levels of the ADC input.


So first decide on th specs u want from ur multimeter.

]]> contact@nospam.com (Ajay Bhargav) Wed, 25 Jun 2008 09:22:22 -0700 http://www.8051projects.net/forum-t10305.html