Piezoelectric based energy harvesting has become a popular research interest for last few years. This is due to the increasing demand for low-powered portable and wearable electronic devices such as health monitoring sensors. This paper presents two polyvinylidene fluoride (PVDF) based energy harvesters, which can be embedded in shoes to generate electric energy while human walking. One of the harvesters is specially designed as a sandwich structure, placed under the ball of foot, while the other one has curved or oval-shaped structure, placed under the heel of foot
