The unprecedented growth rate of "Internet of Things" (IoT) and its potential impacts on wearable and flexible electronics is creating an increasing demand for the development of lightweight, stretchable and transparent sensors in many diverse application areas ranging from personal health monitoring to human inspired electronic skin. In this work, we introduce a novel method to produce high performance, flexible and transparent piezoelectric pressure sensors where piezoelectric and graphitic nanoparticles are aligned together (in "Z" direction) in a polymer matrix under the external electric field. The developed materials can even sense the pressures as low as touch of a bird feather. Apart from its outstanding sensing properties, this method can also be scaled up with a newly developed continuous roll-to-roll (R2R) production line designed and developed by our group at Purdue University.