Energy harvesting is generating energy from multiple sources. Energy is harvested from various sources like piezoelectric, solar cells, wind mills and other such modules. The wireless sensor networks are the networks that are made of small sensor devices like rain measure, environmental pressure etc. To power up the WSN and elongate its lifetime, piezoelectric energy harvester has been used. Low amount of power has been utilized in this simulation to power up the sensor nodes. The model that has been tested under various factors to evaluate the design and provide detailed results. The model is capable of producing the required amount of power at different input factors.