Automatic solar Joule Thief
This is a Joule Thief LED/charger circuit that is being driven automatically by a modified ‘solar garden light’ circuit. In this video I show energy being gathered by a solar cell and put into a 50 farad 2.3 volt supercapacitor. When the light is removed from the solar cell the Joule Thief circuit automatically turns on a white LED and the red charge indicator LED turns off. While the white light is on, energy recovery is shown happening as energy flows into a second but smaller capacitor raising it to a higher voltage than the first. Many thanks to all the people who contributed ideas to this project.