When a computer is used to carry out calculations, energy is
consumed. That’s why a desktop PC, a laptop or a tablet computer all require a
power source – either a mains power supply or a battery.
But what is less well-known is that the entire process can
be reversed. By carrying out sufficiently complex calculations, power can be
generated at the CPU and harnessed to power an external device. For normal
calculations, the amount of power generated is too small to measure, but
NickWorks technologists have found ways to present increasingly demanding
calculations which in turn have yielded significant amounts of power.
In the NickWorks demonstration below, a normal mains voltage
desk lamp is powered directly from a computer’s CPU. This was achieved by
presenting the machine with a particularly taxing prime-number calculation,
visible on the screen.
.... as used by HMRC to calculate erroneous demands for underpayment of income tax & VAT
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