Battery Free Jogger Light
Lighting and Casing
B.C. van Nobelen (TU Delft - Electrical Engineering, Mathematics and Computer Science)
J.R. Edelman (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Massimo Mastrangeli – Mentor (TU Delft - Electronic Components, Technology and Materials)
Virgilio Valente – Graduation committee member (TU Delft - Bio-Electronics)
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Abstract
This document describes the design process and implementation of the lighting and casing of a battery free jogger light. This light is meant to increase the safety of joggers in dark environments. The most effective way of increasing the jogger's conspicuity will be researched by considering different light sources and driver circuits to efficiently power the light source in a blinking manner. A casing will be designed to encapsulate the components. Light emitting diodes were chosen as a light source due to their energy efficiency, colour optimisation and small size. Two LEDs are part of a rectifier, while three other LEDs are powered by a driver circuit that uses a clocked decade counter 4017 IC that receives its clock signal from a NAND based oscillator circuit. The casing is designed with 3D modelling software and a prototype is 3D printed. The intended light intensity was not reached, but the brightness in dark environments was deemed suitable for the project's goals. The casing has bigger dimensions than intended; however these can be optimised for mass production.