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.
|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
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!
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!