Here the generator, in the centre of the chip, powers an accelerometer A tiny generator powered by natural vibrations could soon be helping keep heart pacemakers working.Created by scientists at the University of Southampton, the generator has been developed to power devices where replacing batteries is very difficult. The device is expected initially to be used to power wireless sensors on equipment in manufacturing plants. The generator's creators say the generator is up to 10 times more efficient than similar devices. Power packed The tiny device, which is less than one cubic centimetre in size, uses vibrations in the...