| >Chris Smolinski wrote:
>> If there's anyone who's played with magnetometers and can offer
>> some advice (or maybe recommend another inexpensive commercial
>> unit, or a build-it-yourself option) I'd appreciate it.
>Honeywell has a lowcost magnetic field sensor that was used
>by one of the app's people at Byte Craft when he put
>together a low cost compass. As I recall it was easy to work with,
>he had that part of the project running in about a day.
Honeywell makes both a two axis detector ( X-Y ) and a single axis
detector ( Z ). Using both chips together allows sensing all three
App Notes from Honeywell:
AN-200 : Smart digital magnetometer in the laboratory
AN-201 : SET/RESET Pulse circuits for magnetic sensors
AN-203 : Compass heading using magnetometers
AN-205 : Magnetic Sensor Cross-Axis Effect
They are easy to use, the only hitch being the need to supply a 3-4
amp set/reset pulse to the chip. Their app note AN-201 describes all
this in great detail.
Two Axis sensor: HMC-1002, Newark has these on page 1002 @ 30.00 ea
One Axis sensor: HMC-1001
They also make a Three-Axis sensor hybrid. Again Newark sells these as
well. ( Not Cheap @ 250.00 each ).
Finally, Honeywell makes a complete "Smart Digital Magnetometer" -- It
uses their sensor hybrid, three CS5509 16 bit A/Ds and a PIC16C73. It
outputs the X,Y,Z component of the magnetic field at a rate of 10 to
154 samples second in ASCII. ( Even more @ 1299.00 )
More... (looser matching)
- Last day of these posts
- In 1997
, 1998 only
- New search...