Hi all, i'm currently doing a 3-axis magnetometer using 2 HMC1022

chips. However, i'm unsure if my schematic design is appropriate. Can

somebody shed some light on my design or anyone that have experience in

using HMC1022.



Current stage for my breadboard prototype is on the sensor and

amplification module. I need advice on amplification factor, Vsupply

and whether i have setup correctly.



ps: i have uploaded my schematic under Files. (3-Axis Magnetometer

using HMC1022)



The Set/Reset Circuitry and the Offset Straps are not yet implemented

at this stage.



Thanks in advance.

Hi,



Are you using this to detect changes in the Earth's magnetic field or just

for a digital compass ?







Mark















From: magnetometer@yahoogroups.com [mailto:magnetometer@yahoogroups.com] On

Behalf Of resham_84

Sent: 11 December 2008 07:24

To: magnetometer@yahoogroups.com

Subject: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design







Hi all, i'm currently doing a 3-axis magnetometer using 2 HMC1022

chips. However, i'm unsure if my schematic design is appropriate. Can

somebody shed some light on my design or anyone that have experience in

using HMC1022.



Current stage for my breadboard prototype is on the sensor and

amplification module. I need advice on amplification factor, Vsupply

and whether i have setup correctly.



ps: i have uploaded my schematic under Files. (3-Axis Magnetometer

using HMC1022)



The Set/Reset Circuitry and the Offset Straps are not yet implemented

at this stage.



Thanks in advance.











[Non-text portions of this message have been removed]

Hi,

  Yes I am using it to detect the variation in Earth's magnetic field



Best regards



Emmanuel O. Abe

+234(0)803-447-4604

Physics department,

Federal University of Technology

P M B 704

Akure, Ondo State

Nigeria.



--- On Thu, 12/18/08, MarkD <mdennisond@...> wrote:



From: MarkD <mdennisond@...>

Subject: RE: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design

To: magnetometer@yahoogroups.com

Date: Thursday, December 18, 2008, 3:48 AM













Hi,



Are you using this to detect changes in the Earth's magnetic field or just

for a digital compass ?



Mark



From: magnetometer@ yahoogroups. com [mailto:magnetometer@ yahoogroups. com] On

Behalf Of resham_84

Sent: 11 December 2008 07:24

To: magnetometer@ yahoogroups. com

Subject: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design



Hi all, i'm currently doing a 3-axis magnetometer using 2 HMC1022

chips. However, i'm unsure if my schematic design is appropriate. Can

somebody shed some light on my design or anyone that have experience in

using HMC1022.



Current stage for my breadboard prototype is on the sensor and

amplification module. I need advice on amplification factor, Vsupply

and whether i have setup correctly.



ps: i have uploaded my schematic under Files. (3-Axis Magnetometer

using HMC1022)



The Set/Reset Circuitry and the Offset Straps are not yet implemented

at this stage.



Thanks in advance.



[Non-text portions of this message have been removed]





































[Non-text portions of this message have been removed]

Hi,

Well the circuit you have posted has nowhere near enough gain to

detect the disturbances in the Earth's magnetic field, the gain

feedback resistor on your op-amps will not give you the required gain.

Have a look in the files section of the schematic i made a few Years

ago for the HMC1022, then take a look at my gain feedback resistors on

my op-amps, this will give you an idea of how much gain is needed.

Your 27k resistors will need to be higher in value.

I do not use this design anymore, i use a compass magnetometer now,

built it a few Weeks ago, getting better results with this design.

Hope this helps,



Mark

Hi Mark,



Mark wrote:

> I do not use this design anymore, i use a compass magnetometer now,

> built it a few Weeks ago, getting better results with this design.



schematic please :-)



Cari saluti,

Hannes.

--

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+

| Captain's Universe   http://www.captain.at           |

| Muon      Detector   http://www.cosmicrays.org       |

| Artemia   Homepage   http://www.captain.at/artemia/  |

| Fairy Shrimps http://www.captain.at/fairy-shrimp.php |

| JupiterRadio Astro   http://www.jupiterradio.com     |

| Earth Magnetometer   http://www.magnetometer.org     |

| Mars Base dot  Net   http://www.marsbase.net         |

| Bryophyllum Plants   http://www.bryophyllum.com      |

| Fossils in Austria   http://www.fossils.captain.at   |

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+

Hi Captain, how are things ?





Jorge G. Dewey

SITEG.



--- El jue 18-dic-08, Ing. Hannes Mayer <captain@...> escribió:



De: Ing. Hannes Mayer <captain@...>

Asunto: Re: [magnetometer] Re: Comments needed for my 3-axis magnetometer (using

HMC1022) design

A: magnetometer@yahoogroups.com

Fecha: jueves, 18 diciembre, 2008, 5:42 pm













Hi Mark,



Mark wrote:

> I do not use this design anymore, i use a compass magnetometer now,

> built it a few Weeks ago, getting better results with this design.



schematic please :-)



Cari saluti,

Hannes.

--

+~~~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~+

| Captain's Universe http://www.captain. at |

| Muon Detector http://www.cosmicra ys.org |

| Artemia Homepage http://www.captain. at/artemia/ |

| Fairy Shrimps http://www.captain. at/fairy- shrimp.php |

| JupiterRadio Astro http://www.jupiterr adio.com |

| Earth Magnetometer http://www.magnetom eter.org |

| Mars Base dot Net http://www.marsbase .net |

| Bryophyllum Plants http://www.bryophyl lum.com |

| Fossils in Austria http://www.fossils. captain.at |

+~~~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~~~ ~~~~~~~+































       ¡Felices Fiestas! Enviale una tarjeta electronica gratis a tu familia y

amigos y deseales felices fiestas. http://yahoomorado.com/tarjetas/



[Non-text portions of this message have been removed]

Hi Hannes long time no see,



If you want a schematic I'll draw one up for you but it's very simple,

basically :-



1 x LDR (Light Dependent Resistor)



1 x 100k Thermistor



1 x White LED



1 x Compass



1 x  16-bit ADC (ADS1100)



1 x 12-bit ADC



1 X Microprocessor (Picaxe 28X1 Chip)



No amplification needed, just the ADC's, I use the 16-bit ADC to read from

the temperature sensor & the 12-bit to read from the LDR.



The compass is set pointing North with the LED shining over it thus casting

a shadow from the needle onto the LDR, the shadow is set to half cover the

LDR.



I then get rid of temperature drift using math, all this is put into a black

casing shielded from external light interference.



The sensitivity is very good with minimal temperature drift.







Mark



From: magnetometer@yahoogroups.com [mailto:magnetometer@yahoogroups.com] On

Behalf Of Ing. Hannes Mayer

Sent: 18 December 2008 20:42

To: magnetometer@yahoogroups.com

Subject: Re: [magnetometer] Re: Comments needed for my 3-axis magnetometer

(using HMC1022) design







Hi Mark,



Mark wrote:

> I do not use this design anymore, i use a compass magnetometer now,

> built it a few Weeks ago, getting better results with this design.



schematic please :-)



Cari saluti,

Hannes.

--

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+

| Captain's Universe http://www.captain.at |

| Muon Detector http://www.cosmicrays.org |

| Artemia Homepage http://www.captain.at/artemia/ |

| Fairy Shrimps http://www.captain.at/fairy-shrimp.php |

| JupiterRadio Astro http://www.jupiterradio.com |

| Earth Magnetometer http://www.magnetometer.org |

| Mars Base dot Net http://www.marsbase.net |

| Bryophyllum Plants http://www.bryophyllum.com |

| Fossils in Austria http://www.fossils.captain.at |

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+











[Non-text portions of this message have been removed]

Hi Mark,



yeah, pretty busy here.



No need for a schematic. I can imagine it.

What about vibration ?



Thanks,

Hannes.



MarkD wrote:

> Hi Hannes long time no see,

>

> If you want a schematic I'll draw one up for you but it's very simple,

> basically :-

>

> 1 x LDR (Light Dependent Resistor)

>

> 1 x 100k Thermistor

>

> 1 x White LED

>

> 1 x Compass

>

> 1 x  16-bit ADC (ADS1100)

>

> 1 x 12-bit ADC

>

> 1 X Microprocessor (Picaxe 28X1 Chip)

>

> No amplification needed, just the ADC's, I use the 16-bit ADC to read from

> the temperature sensor & the 12-bit to read from the LDR.

>

> The compass is set pointing North with the LED shining over it thus casting

> a shadow from the needle onto the LDR, the shadow is set to half cover the

> LDR.

>

> I then get rid of temperature drift using math, all this is put into a black

> casing shielded from external light interference.

>

> The sensitivity is very good with minimal temperature drift.

>

>

>

> Mark

>

> From: magnetometer@yahoogroups.com [mailto:magnetometer@yahoogroups.com] On

> Behalf Of Ing. Hannes Mayer

> Sent: 18 December 2008 20:42

> To: magnetometer@yahoogroups.com

> Subject: Re: [magnetometer] Re: Comments needed for my 3-axis magnetometer

> (using HMC1022) design

>

>

>

> Hi Mark,

>

> Mark wrote:

>> I do not use this design anymore, i use a compass magnetometer now,

>> built it a few Weeks ago, getting better results with this design.

>

> schematic please :-)

>

> Cari saluti,

> Hannes.





--

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+

| Captain's Universe   http://www.captain.at           |

| Muon      Detector   http://www.cosmicrays.org       |

| Artemia   Homepage   http://www.captain.at/artemia/  |

| Fairy Shrimps http://www.captain.at/fairy-shrimp.php |

| JupiterRadio Astro   http://www.jupiterradio.com     |

| Earth Magnetometer   http://www.magnetometer.org     |

| Mars Base dot  Net   http://www.marsbase.net         |

| Bryophyllum Plants   http://www.bryophyllum.com      |

| Fossils in Austria   http://www.fossils.captain.at   |

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+

Hi Hannes,



It doesn't suffer from vibrations, it would if I banged it lol, but no it

seems fine.



Do you still have a magnetometer on the go Hannes ?







Mark











From: magnetometer@yahoogroups.com [mailto:magnetometer@yahoogroups.com] On

Behalf Of Ing. Hannes Mayer

Sent: 19 December 2008 12:03

To: magnetometer@yahoogroups.com

Subject: Re: [magnetometer] Re: Comments needed for my 3-axis magnetometer

(using HMC1022) design







Hi Mark,



yeah, pretty busy here.



No need for a schematic. I can imagine it.

What about vibration ?



Thanks,

Hannes.



MarkD wrote:

> Hi Hannes long time no see,

>

> If you want a schematic I'll draw one up for you but it's very simple,

> basically :-

>

> 1 x LDR (Light Dependent Resistor)

>

> 1 x 100k Thermistor

>

> 1 x White LED

>

> 1 x Compass

>

> 1 x 16-bit ADC (ADS1100)

>

> 1 x 12-bit ADC

>

> 1 X Microprocessor (Picaxe 28X1 Chip)

>

> No amplification needed, just the ADC's, I use the 16-bit ADC to read from

> the temperature sensor & the 12-bit to read from the LDR.

>

> The compass is set pointing North with the LED shining over it thus

casting

> a shadow from the needle onto the LDR, the shadow is set to half cover the

> LDR.

>

> I then get rid of temperature drift using math, all this is put into a

black

> casing shielded from external light interference.

>

> The sensitivity is very good with minimal temperature drift.

>

>

>

> Mark

>

> From: magnetometer@yahoogroups.com <mailto:magnetometer%40yahoogroups.com>

[mailto:magnetometer@yahoogroups.com <mailto:magnetometer%40yahoogroups.com>

] On

> Behalf Of Ing. Hannes Mayer

> Sent: 18 December 2008 20:42

> To: magnetometer@yahoogroups.com <mailto:magnetometer%40yahoogroups.com>

> Subject: Re: [magnetometer] Re: Comments needed for my 3-axis magnetometer

> (using HMC1022) design

>

>

>

> Hi Mark,

>

> Mark wrote:

>> I do not use this design anymore, i use a compass magnetometer now,

>> built it a few Weeks ago, getting better results with this design.

>

> schematic please :-)

>

> Cari saluti,

> Hannes.



--

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+

| Captain's Universe http://www.captain.at |

| Muon Detector http://www.cosmicrays.org |

| Artemia Homepage http://www.captain.at/artemia/ |

| Fairy Shrimps http://www.captain.at/fairy-shrimp.php |

| JupiterRadio Astro http://www.jupiterradio.com |

| Earth Magnetometer http://www.magnetometer.org |

| Mars Base dot Net http://www.marsbase.net |

| Bryophyllum Plants http://www.bryophyllum.com |

| Fossils in Austria http://www.fossils.captain.at |

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+











[Non-text portions of this message have been removed]

MarkD wrote:

> Hi Hannes,

>

> It doesn't suffer from vibrations, it would if I banged it lol, but no it

> seems fine.

>

> Do you still have a magnetometer on the go Hannes ?



Mark,



nope. Mag's are on the waiting list here for quite some

time. I'm more into radiation detection now.



But when I finally have the time and motivation, I'll

try your circuit that I also included on magnetometer.org



I'd love to build a (working) proton precession mag -

I actually started one a while ago - but that one never

worked since I don't have a powerful enough power supply

to drive the coil. And then the readout circuit is very

critical - high gain, loves to oscillate!

But one day...

See there comes my passion for particles into the game again.

Spinning protons and magnetic fields... WHOOOAAA :-)



Yours,

Hannes.

--

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+

| Captain's Universe   http://www.captain.at           |

| Muon      Detector   http://www.cosmicrays.org       |

| Artemia   Homepage   http://www.captain.at/artemia/  |

| Fairy Shrimps http://www.captain.at/fairy-shrimp.php |

| JupiterRadio Astro   http://www.jupiterradio.com     |

| Earth Magnetometer   http://www.magnetometer.org     |

| Mars Base dot  Net   http://www.marsbase.net         |

| Bryophyllum Plants   http://www.bryophyllum.com      |

| Fossils in Austria   http://www.fossils.captain.at   |

+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+

I think Silabs C8051F350 is best suited for this task.



Uday

--- On Thu, 18/12/08, Mark <mdennisond@...> wrote:



From: Mark <mdennisond@...>

Subject: [magnetometer] Re: Comments needed for my 3-axis magnetometer (using

HMC1022) design

To: magnetometer@yahoogroups.com

Date: Thursday, 18 December, 2008, 8:34 PM













Hi,

Well the circuit you have posted has nowhere near enough gain to

detect the disturbances in the Earth's magnetic field, the gain

feedback resistor on your op-amps will not give you the required gain.

Have a look in the files section of the schematic i made a few Years

ago for the HMC1022, then take a look at my gain feedback resistors on

my op-amps, this will give you an idea of how much gain is needed.

Your 27k resistors will need to be higher in value.

I do not use this design anymore, i use a compass magnetometer now,

built it a few Weeks ago, getting better results with this design.

Hope this helps,



Mark

































       Add more friends to your messenger and enjoy! Go to

http://messenger.yahoo.com/invite/



[Non-text portions of this message have been removed]

Hi,

     this is probably a silly question...



     * I am on the other end of the magnetometer...

     * I know Nothing about electronics : )

     * I do radio astronomy - solar flares - if they are Here : (

     * can

           o the magnetometer detect solar flares?

           o send data to a PC?

           o what is the Range of values in nano Tesla?



Steve.







Uday Agle wrote:

>

> I think Silabs C8051F350 is best suited for this task.

>

> Uday

> --- On Thu, 18/12/08, Mark <mdennisond@...

> <mailto:mdennisond%40sky.com>> wrote:

>

> From: Mark <mdennisond@... <mailto:mdennisond%40sky.com>>

> Subject: [magnetometer] Re: Comments needed for my 3-axis magnetometer

> (using HMC1022) design

> To: magnetometer@yahoogroups.com <mailto:magnetometer%40yahoogroups.com>

> Date: Thursday, 18 December, 2008, 8:34 PM

>

> Hi,

> Well the circuit you have posted has nowhere near enough gain to

> detect the disturbances in the Earth's magnetic field, the gain

> feedback resistor on your op-amps will not give you the required gain.

> Have a look in the files section of the schematic i made a few Years

> ago for the HMC1022, then take a look at my gain feedback resistors on

> my op-amps, this will give you an idea of how much gain is needed.

> Your 27k resistors will need to be higher in value.

> I do not use this design anymore, i use a compass magnetometer now,

> built it a few Weeks ago, getting better results with this design.

> Hope this helps,

>

> Mark

>

> Add more friends to your messenger and enjoy! Go to

> http://messenger.yahoo.com/invite/ <http://messenger.yahoo.com/invite/>

>

> [Non-text portions of this message have been removed]

>

>







[Non-text portions of this message have been removed]

Hi Steve



I also have a solar flare detector used for GRB detection.

http://www.infiltec.com/SID-GRB@home



Yes, magnetometers can sometimes detect solar flares since the flares

create charged particles that slam into the earth's field and

distort it.



You need to build a single axis magnetometer that has a

resolution of about 1 nano-tesla in order to detect daily

deviations in the earths magnetic

field and any solar flare effects.



I think http://www.fatquarterssoftware.com/ sensors are the least

expensive way to go for such a system.



I built simple FQ sensor system that consists of

some cheapie decade counter chips to slow down

the FQ sensor output from kHz to Hz, followed by

a PIC microprocessor that I programmed to measure

the pulse rate and give a RS232 serial output that

can be displayed on the free Amaseis seismic PC data

logging software.  The main problem with my system

is that it is so sensitive that cars

within 100+ meters drive it off scale.



Happy Holidays



Dave

Baileys Crossroads, VA



--- In magnetometer@yahoogroups.com, "E.S.McCauley" <esmac@...> wrote:

>

> Hi,

>     this is probably a silly question...

>

>     * I am on the other end of the magnetometer...

>     * I know Nothing about electronics : )

>     * I do radio astronomy - solar flares - if they are Here : (

>     * can

>           o the magnetometer detect solar flares?

>           o send data to a PC?

>           o what is the Range of values in nano Tesla?

>

> Steve.

Hi David,

     thanks for that,



     * it sounds promising,

     * I suppose the main question now is

           o if the magnetometer can detect

                 + a solar flare and

                 + a car then

           o is there some way to tell the two signals apart/

                 + by size of signal maybe

                 + or shape perhaps.

     * I have passing cars down the hill at my observatory

           o 100m away,

           o down the hill (30' - 40' lower)



Steve

We have been observing Jupiter all winter and now

we are waiting for the sun to come out of minimum.



David Saum wrote:

>

> Hi Steve

>

> I also have a solar flare detector used for GRB detection.

> http://www.infiltec.com/SID-GRB@home

> <http://www.infiltec.com/SID-GRB@home>

>

> Yes, magnetometers can sometimes detect solar flares since the flares

> create charged particles that slam into the earth's field and

> distort it.

>

> You need to build a single axis magnetometer that has a

> resolution of about 1 nano-tesla in order to detect daily

> deviations in the earths magnetic

> field and any solar flare effects.

>

> I think http://www.fatquarterssoftware.com/

> <http://www.fatquarterssoftware.com/> sensors are the least

> expensive way to go for such a system.

>

> I built simple FQ sensor system that consists of

> some cheapie decade counter chips to slow down

> the FQ sensor output from kHz to Hz, followed by

> a PIC microprocessor that I programmed to measure

> the pulse rate and give a RS232 serial output that

> can be displayed on the free Amaseis seismic PC data

> logging software. The main problem with my system

> is that it is so sensitive that cars

> within 100+ meters drive it off scale.

>

> Happy Holidays

>

> Dave

> Baileys Crossroads, VA

>

> --- In magnetometer@yahoogroups.com

> <mailto:magnetometer%40yahoogroups.com>, "E.S.McCauley" <esmac@...> wrote:

> >

> > Hi,

> > this is probably a silly question...

> >

> > * I am on the other end of the magnetometer...

> > * I know Nothing about electronics : )

> > * I do radio astronomy - solar flares - if they are Here : (

> > * can

> > o the magnetometer detect solar flares?

> > o send data to a PC?

> > o what is the Range of values in nano Tesla?

> >

> > Steve.

>

>







[Non-text portions of this message have been removed]

Hi,



is there a distinct difference between the two functions?

right now, im testing my prototype, calibrating it as a compass with

the voltage responding to the compass direction.

once calibrated (with reference to HMR3000), this can be also used

for detction of earth's magnetic field, am i right?



update on my progress: yup, i would need to increase my 270 resistor

to a higher value because loading effect will occur, as the bridge

resistance of the hmc1022 is typically 1.1k at 5V. that's why my

output voltage from the amplifier is little as the input voltage from

the sensor is drained.



im intending to change my 270 to 1.5k and use 330k as feedback thus a

gain of 220. is this sufficient?

i'm using the best straight line (+/- 1Gauss) as stated in the

datasheet: -4mV to 8mV



if im using 8v supply, my vref would be 4v, my cutoff would be 6.5v



Any recommendations on ADC? im thinking of using ADS8320. Any

comments?



thanks all for your reply and inputs.



regards,

Resham A R





--- In magnetometer@yahoogroups.com, "MarkD" <mdennisond@...> wrote:

>

> Hi,

>

> Are you using this to detect changes in the Earth's magnetic field

or just

> for a digital compass ?

>

>

>

> Mark

>

>

>

>

>

>

>

> From: magnetometer@yahoogroups.com

[mailto:magnetometer@yahoogroups.com] On

> Behalf Of resham_84

> Sent: 11 December 2008 07:24

> To: magnetometer@yahoogroups.com

> Subject: [magnetometer] Comments needed for my 3-axis magnetometer

(using

> HMC1022) design

>

>

>

> Hi all, i'm currently doing a 3-axis magnetometer using 2 HMC1022

> chips. However, i'm unsure if my schematic design is appropriate.

Can

> somebody shed some light on my design or anyone that have

experience in

> using HMC1022.

>

> Current stage for my breadboard prototype is on the sensor and

> amplification module. I need advice on amplification factor,

Vsupply

> and whether i have setup correctly.

>

> ps: i have uploaded my schematic under Files. (3-Axis Magnetometer

> using HMC1022)

>

> The Set/Reset Circuitry and the Offset Straps are not yet

implemented

> at this stage.

>

> Thanks in advance.

>

>

>

>

>

> [Non-text portions of this message have been removed]

>

Actually, i´m searching for a schematic of a gradiometer, using Honeywell ICs,

so I´m open to some advice od idea about it.

Anyway, there are two eyes watching for things related.

Yours, trully





Jorge G. Dewey

SITEG.



--- El jue 11-dic-08, resham_84 <resham88@...> escribió:



De: resham_84 <resham88@...>

Asunto: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design

A: magnetometer@yahoogroups.com

Fecha: jueves, 11 diciembre, 2008, 4:24 am













Hi all, i'm currently doing a 3-axis magnetometer using 2 HMC1022

chips. However, i'm unsure if my schematic design is appropriate. Can

somebody shed some light on my design or anyone that have experience in

using HMC1022.



Current stage for my breadboard prototype is on the sensor and

amplification module. I need advice on amplification factor, Vsupply

and whether i have setup correctly.



ps: i have uploaded my schematic under Files. (3-Axis Magnetometer

using HMC1022)



The Set/Reset Circuitry and the Offset Straps are not yet implemented

at this stage.



Thanks in advance.

































       ¡Felices Fiestas! Enviale una tarjeta electronica gratis a tu familia y

amigos y deseales felices fiestas. http://yahoomorado.com/tarjetas/



[Non-text portions of this message have been removed]

Check the magneticsensors.com website for the ask the engineer section.











Mark Amundson P.E.  Magnetic Sensors Applications Engineer, Honeywell Aerospace



12001 Highway 55, Plymouth MN 55008



763-954-2622  mark.amundson@...  www.magneticsensors.com















From: magnetometer@yahoogroups.com [mailto:magnetometer@yahoogroups.com] On

Behalf Of Jorge Dewey

Sent: Thursday, December 18, 2008 1:48 PM

To: magnetometer@yahoogroups.com

Subject: Re: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design







Actually, i´m searching for a schematic of a gradiometer, using Honeywell ICs,

so I´m open to some advice od idea about it.

Anyway, there are two eyes watching for things related.

Yours, trully



Jorge G. Dewey

SITEG.



--- El jue 11-dic-08, resham_84 <resham88@...

<mailto:resham88%40hotmail.com> > escribió:



De: resham_84 <resham88@... <mailto:resham88%40hotmail.com> >

Asunto: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design

A: magnetometer@yahoogroups.com <mailto:magnetometer%40yahoogroups.com>

Fecha: jueves, 11 diciembre, 2008, 4:24 am



Hi all, i'm currently doing a 3-axis magnetometer using 2 HMC1022

chips. However, i'm unsure if my schematic design is appropriate. Can

somebody shed some light on my design or anyone that have experience in

using HMC1022.



Current stage for my breadboard prototype is on the sensor and

amplification module. I need advice on amplification factor, Vsupply

and whether i have setup correctly.



ps: i have uploaded my schematic under Files. (3-Axis Magnetometer

using HMC1022)



The Set/Reset Circuitry and the Offset Straps are not yet implemented

at this stage.



Thanks in advance.



¡Felices Fiestas! Enviale una tarjeta electronica gratis a tu familia y amigos

y deseales felices fiestas. http://yahoomorado.com/tarjetas/



[Non-text portions of this message have been removed]











[Non-text portions of this message have been removed]

Thank you Mark. I will do it.





Jorge G. Dewey

SITEG.



--- El jue 18-dic-08, Amundson, Mark D (SENCOE) <mark.amundson@...>

escribió:



De: Amundson, Mark D (SENCOE) <mark.amundson@...>

Asunto: RE: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design

A: magnetometer@yahoogroups.com

Fecha: jueves, 18 diciembre, 2008, 6:21 pm













Check the magneticsensors. com website for the ask the engineer section.











Mark Amundson P.E. Magnetic Sensors Applications Engineer, Honeywell Aerospace



12001 Highway 55, Plymouth MN 55008



763-954-2622 mark.amundson@ honeywell. com www.magneticsensors .com















From: magnetometer@ yahoogroups. com [mailto:magnetometer@ yahoogroups. com] On

Behalf Of Jorge Dewey

Sent: Thursday, December 18, 2008 1:48 PM

To: magnetometer@ yahoogroups. com

Subject: Re: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design







Actually, i´m searching for a schematic of a gradiometer, using Honeywell ICs,

so I´m open to some advice od idea about it.

Anyway, there are two eyes watching for things related.

Yours, trully



Jorge G. Dewey

SITEG.



--- El jue 11-dic-08, resham_84 <resham88@hotmail. com <mailto:resham88%

40hotmail. com> > escribió:



De: resham_84 <resham88@hotmail. com <mailto:resham88% 40hotmail. com> >

Asunto: [magnetometer] Comments needed for my 3-axis magnetometer (using

HMC1022) design

A: magnetometer@ yahoogroups. com <mailto:magnetomete r%40yahoogroups. com>

Fecha: jueves, 11 diciembre, 2008, 4:24 am



Hi all, i'm currently doing a 3-axis magnetometer using 2 HMC1022

chips. However, i'm unsure if my schematic design is appropriate. Can

somebody shed some light on my design or anyone that have experience in

using HMC1022.



Current stage for my breadboard prototype is on the sensor and

amplification module. I need advice on amplification factor, Vsupply

and whether i have setup correctly.



ps: i have uploaded my schematic under Files. (3-Axis Magnetometer

using HMC1022)



The Set/Reset Circuitry and the Offset Straps are not yet implemented

at this stage.



Thanks in advance.



¡Felices Fiestas! Enviale una tarjeta electronica gratis a tu familia y amigos

y deseales felices fiestas. http://yahoomorado. com/tarjetas/



[Non-text portions of this message have been removed]









[Non-text portions of this message have been removed]

































       ¡Felices Fiestas! Enviale una tarjeta electronica gratis a tu familia y

amigos y deseales felices fiestas. http://yahoomorado.com/tarjetas/



[Non-text portions of this message have been removed]