In the remaining tests, a 1000 load was used instead of 680 .
In previous tests of the device using the electrodynamic shaker, the
optimal resistance was between 1000 and 2000 , as seen in Fig. 7.
Considering that the frequency and acceleration applied to the
energy harvester varies based on each individual’s walking style,
1000 was selected because the penalty for choosing a lower than
optimal load resistance is more severe than choosing one that is
higher than the optimal resistance.
6.