Optimization of a Mobile Audio and Video System Powered by a Bicycle Dynamo

Abstract

Cynecycle tries to promote sport, electricity generation through a dynamo and learning through the projection of educational and cultural videos. The mobile audio and video system is made up of a dynamo, a voltage collection box or “Power Box”, an amplifier box, a projector and two speakers. The system does not have a base to hold the dynamo while the cyclist pedals it, in addition, the “Power Box” of the system is damaged and the components for its repair are not available in the country. Other parameters to consider are the weight and the operating time, this due to the capacitor bank available in the system, which makes the transportation very difficult and the long projection of videos. To solve those problems, a metal base has been built, which allows the dynamo to be held against the bicycle wheel when the cyclist generates energy to charge the battery bank through the new “Power Box” designed. The charging and discharging time of the battery was considerably improved by replacing the capacitor bank with a lithium battery bank, in this way the duration of the video projection was increased and the total weight of the new “Power Box” was reduced. The loudspeaker material was modified to improve the sound quality. Therefore, the work comprises the results of the optimization of an audio and video system powered by a dynamo to generate power by moving the rim anchored to the stem of the dynamo.