Monday, November 07, 2011

Power is off!

Back in the late 1960's we used to dream about how to design a system so that a light would go on, to warn you that you no longer had power. Today, there are so many ways of storing electrical power that such lights are routine. But I still find it disconcerting when I recharge my cell phone and its display says:
Recharging ... power is off.
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