I have a project that seems to be a good candidate for a current sense
resistor made as a part of the PCB.  I am using the free calculator,
PCBTEMP, from the UltraCAD website (http://www.ultracad.com/calc.htm) for
geometry calculations. I need to know the expected variability in thickness,
batch to batch, for the copper foil on 2-oz stock.  I can live with the 0.4%
TC of the Cu, but I need to evaluate all the other variables in my error
budget before I present my proposal.  I would appreciate any success (or
horror) stories from people who have (not) used the board copper as a
current sense method.

Thanks,
Carl



Carl Van Wormer
Cipher Systems
1815 NW 169th Place, Suite 5010
Beaverton, OR  97006
Phone (503)-617-7447    Fax (503)-617-6550

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-----------------------------------------------------