Multipurpose stationary exercising pedaling system

Chidembo, Theresa Sarudzai
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Middle to low-income people in developing countries usually spend most of their time making ends meet. Therefore they do not get time to enhance their physical fitness by exercising. Moreover, frequent power cuts make them stay in the dark at home at night. In this project, an affordable home multipurpose stationary pedaling system is made. The concept of speed detection using a Hall Effect sensor, a magnet, an Arduino and a comparator is used to obtain revolutions per minute (rpm) values and time using Millis. The average maximum speed detected after five experiments is 26.57 rpm. The low-speed detection capacity is attributed to the non-robust application nature of the components used in the project. Simulation results, however, show that the minimum speed that the MatLab Simulink DC machine operating as a generator has to be supplied with is 18850 rpm input to generate power that charges a 12V lead-acid battery. As speed increases, the power produced by the generator increases. Calories burnt are determined using measured power output of the generator and frictional losses of the system converted to Joules using the standard conversion. Moreover, a charge controller that allows discharging the battery above 80% and charging at 40% of its voltage is made using circuit breakers.
Capstone Project submitted to the Department of Engineering, Ashesi University in partial fulfillment of the requirements for the award of Bachelor of Science degree in Electrical and Electronic Engineering, May 2020
multipurpose exercising pedaling system, conversion mechanical energy to electrical energy, simulation