> Think you'd better recheck the calculations! :o) > > 0.2/2.5 = 0.08 Ohms > > A 1R0 resistor would be dissipating 6.25 Watts! Hmmm - can I plead 1am ? :-) I can see how I made the mistake but I'm annoyed that I did. If I had used I^2R for my power (as I almost did) rather than VI it would have been clear. So close :-( OK DSE 0r1 5W = R1600 Also in stock everywhere. http://www.dse.co.nz/cgi-bin/dse.storefront/40dc24ed018535d8273fc0a87f99070f/Product/View/R1600 RM -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads