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Mar 11, 2011 at 11:12 comment added jpc Reed switches (en.wikipedia.org/wiki/Reed_switch) may be especially useful.
Mar 10, 2011 at 21:01 comment added OlivierB A relay may indeed do it I guess. But as you pointed out, the switching speed is an issue. This would be a serious bottleneck in my design, so I will only consider it if I have really no other choice...
Mar 10, 2011 at 20:46 history answered Taniwha CC BY-SA 2.5