Abstract>An energy harvesting device for frequencies of less than 2 Hz with amplitudes of several cm was developed. A pendulum is driving a gear mechanism similar as a clock unit which is driving a wheel carrying 36 magnets. Next to the magnets there are mounted 18 coils generating voltage. This way, a maximum voltage and power of 21.5 V and 114 mW are achieved at 1.25 Hz and 57 mm amplitude.
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