- on Power Supplies
1 Candle Power
February 4, 2016 | 01:47
The Korean company Lumir have launched a Kickstarter campaign to fund an LED table light powered by the heat of a tea light. The active component inside is a Peltier element which...
The Korean company Lumir have launched a Kickstarter campaign to fund an LED table light powered by the heat of a tea light. The active component inside is a Peltier element which produces energy from the temperature difference between two surfaces. The thermoelectric Peltier element consists of n-type and p-type semiconductors positioned thermally in parallel and electrically in series with a heat conductive surface at each side. When a DC voltage is applied between the free ends of the semiconductors the resulting current flow across the junctions produces a temperature difference between the two surfaces. As in this application, it also works in reverse (Seebeck effect); heat from the tea light causes a temperature difference between the two surfaces which produces a DC output current to light the LEDs. When it comes to energy efficiency, a burning candle only converts a few percent of the energy it consumes to produce visible light. The vast majority of energy is lost as heat...
Member access only Please login here
Or become an Elektor member today!
Become a member of the Elektor community and receive all the benefits that come with it every day! Join 120.000 members today!