Marcie is an electronic magnetic compass with serial interface. Marcie was developed during a Studienarbeit at RCS at the TU in Munich.
Marcie has to be connected to the RS232 port of a computer running Linux.
Specs:
| price of parts: | about 50 Euro |
| supply voltage: | 11-14 V (8..9V) DC |
| current: | max. 50 mA |
| data rate: | 19200 baud, 8 databits, 1 stopbit, no parity |
| error: | < ±2° in homogenous field and with calibration |
| dimensions without case: | 80x46x20mm |
The following files contain all information that is nessecairy to build Marcie:
Documentation in html-format or the original student's thesis in pdf-format (sorry german only)
To build the board use:
the layouttransparencies kompasslayout_t.gif
and
kompasslayout_b.gif
or
Eagle with kompass.sch
and kompass.brd
Sourcecode: marciesrc.tgz (tared and zipped)
You could get the parts from e.g. Conrad and Farnell.
The part T1, a NDS 8958 is actually hard to get! But a NDS9943, a
IRF7309 or a SI9938DY should work as well!
Important note:
Allthough the compass was built once with the plans above, there is
no warranty that the provided plans and programs are correct. Use at your
own risk!
