UGN3503U

[Carlos]

Hello to all:
I can construct magnetometer differential using the sensors hall UGN350U? Give me any commentary and helps


Carlos

[nickf]

Re: UGN3503U

I think you'd have trouble making anything but a low resolution mag. I did some rough calculations from the data sheet a while ago: the sensors produce a change of about 1.3mV per gauss which is 100,000 nT (roughly twice the earth's magnetic field). This works out at about 0.013 microvolts per nT. Looking at the noise figures for the sensor you would get a noise level of several microvolts from the sensor itself even without the noise of the analog circuitry and the sensors are affected by temperature as well so the best you could hope for would be a resolution of several hundred (or more likely thousand) nT. I saw a circuit on the web somewhere that used a 3503 with an iron nail glued to it to concentrate the flux around the sensor so maybe there is a way to squeeze a bit more out of them. On the plus side it would only cost a few dollars and have no coils to wind !

[Carlos]

Re: UGN3503U

If I use the UGN3515 with 5 mV/Gauss sensor hall?


Thanks

Carlos

[Carlos]

Re: UGN3503U

http://www.bioelectrifier.com/ufo1.htm
it is the site?


thanks

Carlos

[nickf]

Re: UGN3503U

Yes ! that's it.

There's a datasheet for the sensor he used on the web at

http://www.mech.nwu.edu/courses/433/Datasheets/HallSwitch_hal400.pdf

He doesn't seem to give any calibrating data or comparative output from another magnetometer though (just one UFO ! maybe...) so you can't really say how sensitive his detector is.

[Carlos]

Re: UGN3503U




Any have built this compass with the UGN3503 sensor?
I have the text of elektor in spanish

Carlos

[nickf]

Re: UGN3503U

Looking at the circuit the output of the two sensors is fed into a diff. amplifier so I presume they are mounted "back to back" facing in different directions which would help with the temp drift and reduce the noise a little bit too. Are there any instructions about how to mount the sensors ?

[Carlos]

Re: UGN3503U

your comentary is correct, the two sensor are mounted in oposite place.

Carlos