... Hi Robert! I just had a quick look. Looks promising! If the specs are actually that good, it's worth a try. BTW, I got the AD coverters from analog.com...
Hi all, Does it make a difference if the compass needle that normally points north is set to point East or West ? I've just built a circuit using the HMC1022...
... Hi Mark! I just had a very quick look at the datasheet of the HMC1022: http://www.ssec.honeywell.com/magnetic/datasheets/hmc1001-2_1021-2.pdf It seems to...
Hi Hannes, Sorry the way i wrote the post made it sound like i was using a compass with the HMC1022. They're both seperate but hoping to set the HMC1022 up at...
Hannes, Sorry you already have the honeywell web address DOH !!!! I've just built a simple op-amp amplifier to amplify the signal with a set/reset pulse incase...
Hi Mark! ... I see! So it is indeed like the KMZ51 - built-in coil to reset the chip and a magnetoresistive bridge. How much did you pay for the Honeywell chip...
Forgot about your east/west question: Take a look into the archive (look for the subject line "North-South or East-West"): I asked a similar question a few...
Hannes wrote:- ... with a ... the chip. ... chip and ... chip ? HI hannes & all, I paid about £22 & i got it from Farnell Electronics Catalogue me wrote:- ......
Hi again Hannes & all, Yes good stuff that thanks. But what i'm thinking is, the compass needle that points North, if that is forced set to East to take...
... Dear Mark, It's a curious question that you ask. Taken at face value it would seem that it would make a difference. However, your question raises many...
Joseph DiVerdi
diverdi@...
Oct 14, 2003 2:22 am
101
Hi Joseph & all, On this website:- <A HREF="http://www.dcs.lancs.ac.uk/iono/aurorawatch/">http://www.dcs.lancs.ac.uk/iono/aurorawatch/</A> It tells you on the...
Hi all, Been testing my HMC1022 circuit, badly effected by temperature variations. Going to try a thermistor in feedback tomorrow to compensate for temperature...
Two thoughts about temperature drift. As I think I mentioned earlier. We were able to gain a rather constant temp by burying a magnetomer sensor about 2 meters...
Hi Jim Sky & all, Using a microprocessor to read the value of a thermistor & read the value of what's coming out of the magnetometer chip & then make the...
It would seem that using the thermistor in a feedback loop to maintain a constant temperature for the magnetometer would be the simplest solution to your...
Constant temp ovens involve current flow somewhere near the magnetometer, definitely a nono. Thermos jugs are really cheap, though, and will slow the drift a...
Good point, you could use ac current for the heater.......at expense of greater circuit complexity. Ralph ... From: Don Latham To: magnetometer@yahoogroups.com...
Hi all, Been testing the HMC1022 circuit during the weekend after finally getting rid of the temperature drift problem. The one thing that bothers me now is i...
I've built 3 magnetometers, one optical, one force balance force balance and one compass detector. The compass detector was by far the least sensitive of the ...
Hi John & all, Interesting how your compass detector was the least sensitive, i found it to perform really well apart from that i had to occasionally (about...
... Hi Mark! I have not been very talkative the past few days ... sorry! Pretty much work at the company ... On Friday I wanted to go to Germany and buy the...
Hi all, Very exciting. i have just picked up a big disturbance at 6:00am this morning. I was awoken by an alarm to see the graph being plotted dropping right...
... Hi Mark! VERY COOL! CONGRATULATIONS!!! :-))) Take a look at these plots: http://geo.phys.uit.no/realtime2.html Kp-index was 9(!) about 8 hours ago, but now...
Hi Charles & all, Blimey that would be interesting, could that happen in our lifetime ? I've heard nothing like that happening on the discovery channel ...
Hi all! After many unsuccessful attempts to get the KMZ51 sensor I finally found one vendor in Germany who carries the sensor :-) The vendor even accepts...
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