Browsing by Author "Wijeratne, Y.M.J.U."

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    Robotic Frog
    (Uva Wellassa University of Sri Lanka, 2013) Wijeratne, Y.M.J.U.; Wijesooriya, P.N.; Ekanayake, R.M.T.C.B.
    All jumping involves the application of force against a substrate, which in turn generates a reactive force that propels the jumper away from the substrate (Willoms, 2006; Armour et al., 2007). Any solid or liquid capable of producing an opposing force can serve as a substrate, including ground or water. Examples of the latter include dolphins performing traveling jumps, and Indian skitter frogs executing standing jumps from water (D.E. Koditschek. and M. Bühler, 1991; Willoms, 2006). There are several types of projects done before in amphibious robotics for imitate animal’s locomotive mechanisms, behaviors in different environments, imitate their sounds (Saito et al., 1994; Willoms, 2006). In this project it is focused to imitate the mechanism of frog which use for their locomotion. Methodology To control the servo in 360 degrees, gears of the servo were modified because in normal conditions, they do not allow more than 180 degrees rotation. Then controlling circuit was prepared to give pulses to the servo for its rotation. Two NES 537 servo motors were used in this project. To modify the gear system, first the potentiometer was removed and a resister unit was added.