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.

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