The wave equation is a direct but a complex approach to solve analytically for the Chladni figures, mainly because of the complications that non-smooth and open boundary conditions impose. In this paper, we present an alternate solution model based on the principle of Huygens-Fresnel and on the ideas of Bohr for the hydrogen atom. The proposed model has been implemented numerically and compared, with good agreement, to our own experimental results for the case of a thin homogenous circular plate with open boundaries.

Abstract. In this paper we present the didactic experience of building a low-cost robot composed of sensors, actuators, general electronics and already available frameworks. The control of the robot is through the usage of commercial Open Source platforms as Arduino; and the Raspberry Pi. The experience ranges from general conceptualization, mechanical, electric and electronic design, microcontroller programming and communications.

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