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Digital Multi-Meter using 8051


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SANATH EMBEDDED

Tue Jun 24 2008, 11:26PM

Registered Member #2561

Joined: Tue Jul 24 2007, 11:26PM

Posts: 127
Thanked 14 times in 12 posts

Hi to all,
i want to design the digital multi-meter using 8051. Can anyone help me in this regard.

Sanath
Bangalore

With Regards,

Sanath Kumar
Mangalore/ Bangalore/Pune

Email: sanathmcx@rediffmail.com

" Embedded System is my Passion "

pdi33

Wed Jun 25 2008, 09:22AM

Registered Member #1329

Joined: Mon Jun 04 2007, 09:28AM

Posts: 628
Thanked 136 times in 132 posts

well, sanath.
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.

* inspired to develop,developing to inspire *


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davidj | 21 Nov : 20:23

Hi , I need help with a project based on a At89c51 ADC804 to detect a 60 hz signal. I simulated it in Proteus and worked fine, but wont work in the real circuit. I think I might be connecting something the wrong way , Can you help me

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8051 ADC can anybody help me ?

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Anonymous | 21 Nov : 05:03

hi, plz send me the data sheet of LT543 7_segment display

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Anonymous | 21 Nov : 02:24

hi have u project report onserial data communication between two 8051 using bluetooth

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