I am new to MSP. i want to design an Ohm meter using MSP 430. Can anyone suggest
how do I start...
ohm meter using msp430
Started by ●March 8, 2014
Reply by ●March 8, 20142014-03-08
I=V/R?
Al
On 8/03/2014 5:55 PM, e...@ee.iitm.ac.in wrote:
> I am new to MSP. i want to design an Ohm meter using MSP 430. Can anyone suggest how do I start...
>
>
>
Al
On 8/03/2014 5:55 PM, e...@ee.iitm.ac.in wrote:
> I am new to MSP. i want to design an Ohm meter using MSP 430. Can anyone suggest how do I start...
>
>
>
Reply by ●March 8, 20142014-03-08
can you elaborate..
On Sat, Mar 8, 2014 at 2:28 PM, Onestone wrote:
> I=V/R?
>
> Al
> On 8/03/2014 5:55 PM, e...@ee.iitm.ac.in wrote:
> > I am new to MSP. i want to design an Ohm meter using MSP 430. Can anyone
> suggest how do I start...
> >
> >
> >
>
> >
> >
> >
> > Yahoo Groups Links
> >
> >
> >
> >
>
On Sat, Mar 8, 2014 at 2:28 PM, Onestone wrote:
> I=V/R?
>
> Al
> On 8/03/2014 5:55 PM, e...@ee.iitm.ac.in wrote:
> > I am new to MSP. i want to design an Ohm meter using MSP 430. Can anyone
> suggest how do I start...
> >
> >
> >
>
> >
> >
> >
> > Yahoo Groups Links
> >
> >
> >
> >
>
Reply by ●March 8, 20142014-03-08
In Sat, Mar 8, 2014 at 4:06 AM, ANAND SAI VERMA wrote:
> can you elaborate..
All you can measure directly with an MSP430 (or any microcontroller,
for that matter) is voltage.
Can you think of a way to take a voltage measurement and compute an
unknown resistance from it?
-p.
> can you elaborate..
All you can measure directly with an MSP430 (or any microcontroller,
for that matter) is voltage.
Can you think of a way to take a voltage measurement and compute an
unknown resistance from it?
-p.
Reply by ●March 8, 20142014-03-08
I shouldn't have to. This is all the information you need for this task,
other than the fact that the micro you choose will need some kind of A/D
converter. Since you can only measure V, and the objective is to find R
you will need to know the current and voltage. This would suggest a
constant current source, a voltage reference and a little simple
programming.
so:
R= V/I
Its 46 years since I last had to do homework, and I'm not planning to
start again any time soon.
Al
On 8/03/2014 7:36 PM, ANAND SAI VERMA wrote:
> can you elaborate..
> On Sat, Mar 8, 2014 at 2:28 PM, Onestone > > wrote:
>
> I=V/R?
>
> Al
>
> On 8/03/2014 5:55 PM, e...@ee.iitm.ac.in
> wrote:
> > I am new to MSP. i want to design an Ohm meter using MSP 430.
> Can anyone suggest how do I start...
> >
> >
> >
>
> >
> >
>
> >
> > Yahoo Groups Links
> >
> >
> >
>
other than the fact that the micro you choose will need some kind of A/D
converter. Since you can only measure V, and the objective is to find R
you will need to know the current and voltage. This would suggest a
constant current source, a voltage reference and a little simple
programming.
so:
R= V/I
Its 46 years since I last had to do homework, and I'm not planning to
start again any time soon.
Al
On 8/03/2014 7:36 PM, ANAND SAI VERMA wrote:
> can you elaborate..
> On Sat, Mar 8, 2014 at 2:28 PM, Onestone > > wrote:
>
> I=V/R?
>
> Al
>
> On 8/03/2014 5:55 PM, e...@ee.iitm.ac.in
> wrote:
> > I am new to MSP. i want to design an Ohm meter using MSP 430.
> Can anyone suggest how do I start...
> >
> >
> >
>
> >
> >
>
> >
> > Yahoo Groups Links
> >
> >
> >
>
Reply by ●March 8, 20142014-03-08
Thevenin is your friend.
Emmett Redd Ph.D. mailto:E...@missouristate.edu
Professor (417)836-5221
Department of Physics, Astronomy, and Materials Science
Missouri State University Fax (417)836-6226
901 SOUTH NATIONAL Lab (417)836-3770
SPRINGFIELD, MO 65897 USA Dept (417)836-5131
In statesmanship get the formalities right, never mind about the moralities. -- Mark Twain.
________________________________________
From: m... [m...] On Behalf Of Peter Johansson [r...@gmail.com]
Sent: Saturday, March 08, 2014 5:15 AM
To: m...
Subject: Re: [msp430] ohm meter using msp430
In Sat, Mar 8, 2014 at 4:06 AM, ANAND SAI VERMA wrote:
> can you elaborate..
All you can measure directly with an MSP430 (or any microcontroller,
for that matter) is voltage.
Can you think of a way to take a voltage measurement and compute an
unknown resistance from it?
-p.
Emmett Redd Ph.D. mailto:E...@missouristate.edu
Professor (417)836-5221
Department of Physics, Astronomy, and Materials Science
Missouri State University Fax (417)836-6226
901 SOUTH NATIONAL Lab (417)836-3770
SPRINGFIELD, MO 65897 USA Dept (417)836-5131
In statesmanship get the formalities right, never mind about the moralities. -- Mark Twain.
________________________________________
From: m... [m...] On Behalf Of Peter Johansson [r...@gmail.com]
Sent: Saturday, March 08, 2014 5:15 AM
To: m...
Subject: Re: [msp430] ohm meter using msp430
In Sat, Mar 8, 2014 at 4:06 AM, ANAND SAI VERMA wrote:
> can you elaborate..
All you can measure directly with an MSP430 (or any microcontroller,
for that matter) is voltage.
Can you think of a way to take a voltage measurement and compute an
unknown resistance from it?
-p.
Reply by ●March 8, 20142014-03-08
Check this on an arduino forum. Different device, but the fundamentals are
unchanged.
http://forum.arduino.cc/index.php/topic,21614.0.html http://forum.arduino.cc/index.php/topic,21614.0.html
http://forum.arduino.cc/index.php/topic,21614.0.html http://forum.arduino.cc/index.php/topic,21614.0.html
Reply by ●March 8, 20142014-03-08
Better put: R = V/I , if you want to design an ohmmeter instead of a voltmeter
http://www.sengpielaudio.com/calculator-ohmslaw.htm
Basically, build a ladder of resistors to use against the ADC within the MSP430
http://www.google.com/search?btnG=1&pws=0&q=How+to+build+an+ohmmeter+using+Msp430
Which leads to a very deep PDF:
http://physics.gu.se/~larsbn/Publikationer/pub3_2012.pdf
http://www.sengpielaudio.com/calculator-ohmslaw.htm
Basically, build a ladder of resistors to use against the ADC within the MSP430
http://www.google.com/search?btnG=1&pws=0&q=How+to+build+an+ohmmeter+using+Msp430
Which leads to a very deep PDF:
http://physics.gu.se/~larsbn/Publikationer/pub3_2012.pdf
Reply by ●March 8, 20142014-03-08
Does it matter, the formula is (or was) usually given as V=IR, if you
can't organise that to find any of the terms given any 2 then you really
shouldn't be doing this stuff.
Or am I just old fashioned?
Al
On 9/03/2014 2:35 AM, paul Johnston wrote:
> Better put: R = V/I , if you want to design an ohmmeter instead of a voltmeter
> http://www.sengpielaudio.com/calculator-ohmslaw.htm
>
> Basically, build a ladder of resistors to use against the ADC within the MSP430
> http://www.google.com/search?btnG=1&pws=0&q=How+to+build+an+ohmmeter+using+Msp430
> Which leads to a very deep PDF:
> http://physics.gu.se/~larsbn/Publikationer/pub3_2012.pdf
>
>
>
>
can't organise that to find any of the terms given any 2 then you really
shouldn't be doing this stuff.
Or am I just old fashioned?
Al
On 9/03/2014 2:35 AM, paul Johnston wrote:
> Better put: R = V/I , if you want to design an ohmmeter instead of a voltmeter
> http://www.sengpielaudio.com/calculator-ohmslaw.htm
>
> Basically, build a ladder of resistors to use against the ADC within the MSP430
> http://www.google.com/search?btnG=1&pws=0&q=How+to+build+an+ohmmeter+using+Msp430
> Which leads to a very deep PDF:
> http://physics.gu.se/~larsbn/Publikationer/pub3_2012.pdf
>
>
>
>
Reply by ●March 8, 20142014-03-08
On Sat, Mar 8, 2014 at 3:08 PM, Onestone wrote:
> Does it matter, the formula is (or was) usually given as V=IR, if you
> can't organise that to find any of the terms given any 2 then you really
> shouldn't be doing this stuff.
>
> Or am I just old fashioned?
Sadly, it seems as if the current generation has not learned how to
search for information or is too lazy to do so. Fortunately, they
cannot be bothered with e-mail either, and these types of questions
(i.e. those that can be easily answered with a simple google search)
have come to dominate many web-based forums.
-p.
> Does it matter, the formula is (or was) usually given as V=IR, if you
> can't organise that to find any of the terms given any 2 then you really
> shouldn't be doing this stuff.
>
> Or am I just old fashioned?
Sadly, it seems as if the current generation has not learned how to
search for information or is too lazy to do so. Fortunately, they
cannot be bothered with e-mail either, and these types of questions
(i.e. those that can be easily answered with a simple google search)
have come to dominate many web-based forums.
-p.
