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a circuit with a current consumption of about 20-30 mA drops some 300 mV across 2*~2m of such cable. so that's around 2-4 Ohm/m. 2012-07-06 18:17 pabs3 has quit [Read error: Connection reset by peer] 2012-07-06 18:20 Textmode has joined #qi-hardware 2012-07-06 18:21 pabs3 has joined #qi-hardware 2012-07-06 18:44 Textmode has quit [Read error: Connection reset by peer] 2012-07-06 18:44 Textmode has joined #qi-hardware 2012-07-06 19:29 jekhor has joined #qi-hardware 2012-07-06 19:45 lol 2012-07-06 19:49 1.7E-6 ohm*cm 2012-07-06 19:50 pabs3 has quit [Ping timeout: 255 seconds] 2012-07-06 19:51 ~1.7 * 10**-6 / 0.05 / 0.05 * 400 2012-07-06 19:51 0.272 2012-07-06 19:52 ohms for 4 m of 0.5*0.5mm (square) wire 2012-07-06 19:53 ~30 * 10**-3 * 0.272 2012-07-06 19:53 0.00816 2012-07-06 19:54 ~30 * 10**-3 * 4 * 4 2012-07-06 19:54 0.48 2012-07-06 19:54 err 2012-07-06 19:55 no err 2012-07-06 19:55 4R * 4m 2012-07-06 19:55 vs 0.272R @ 4m 2012-07-06 19:56 ~1.7 * 10**-6 / 0.02 / 0.02 * 400 2012-07-06 19:56 1.7 2012-07-06 20:01 heh, (0.5 mm)^2. i wish :) 2012-07-06 20:01 but when i compare with the same sort of wire they sell at digi-key, it's still an order of magnitude off. very suspicious. 2012-07-06 20:02 maybe they used aluminium or such. every picocent counts :) 2012-07-06 20:13 http://www.wolframalpha.com/input/?i=copper+resistivity "~0.6 * resistivity of alu" 2012-07-06 20:15 "~0.3 to 0.8 x resistivity of alu alloy at room temp" 2012-07-06 20:21 could work. make the wire a bit thinner too, and you're there :) 2012-07-06 20:42 antgreen has quit [Remote host closed the connection] 2012-07-06 21:26 FrankBlues has quit [Remote host closed the connection] 2012-07-06 21:29 kuribas has quit [Quit: ERC Version 5.3 (IRC client for Emacs)] 2012-07-06 21:39 kristoffer has quit [Quit: Leaving] 2012-07-06 21:41 jekhor has quit [Ping timeout: 265 seconds]