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About

Callen Votzke is a pioneering researcher at the intersection of soft robotics, ultra-low-power electronics, and intelligent sensing systems. Their work focuses on three key areas: agricultural robotics with tactile perception, energy-efficient sensor interfaces, and stretchable electronic circuits for soft robots. Votzke’s most impactful contribution is their 2021 study on intelligent fruit picking, which demonstrated how in-hand sensing—combining visual and tactile feedback—can improve fruit quality during harvest by reducing bruising and ensuring stem retention. This work has garnered 22 citations and addresses a critical challenge in agricultural automation. Votzke also developed a groundbreaking duty-cycled resistor and frequency-locked-loop-based Wheatstone bridge interface, achieving an ultra-low power consumption of just 20 μW in a 0.05mm² footprint, advancing environmental sensing for temperature, humidity, and pressure. Their 2022 paper on self-sensing, stretchable active circuit arrays introduced liquid metal paste as a dual-purpose interconnect and strain sensor, enabling conformable electronics for soft robotics and wearables. More recently, Votzke integrated modular sensors into soft robots using stretchable wires for nuclear infrastructure inspection and radiation spectroscopy, showcasing the practical deployment of compliant electronics in hazardous environments. With a growing citation record and innovations spanning from farm to nuclear facilities, Votzke is shaping the future of intelligent, flexible, and energy-efficient robotic systems.