30 Mar '16, 11pm

A Ridiculous Way to Light an LED: Candle-power

A Ridiculous Way to Light an LED: Candle-power

If you have ever entertained yourself by reading comprehensive electronic-theory textbooks you’ll have seen references to technologies that sound really interesting but which you will rarely hold in your hand. They may be dead-ends that have been superseded by more recent innovations, or they may be technologies that have found uses but in other fields from those in which they originally showed promise. What if you could take these crazy parts and actually build something? [Fedetft] has an interesting project that combines two of those intriguing textbook references, he’s created a thermopile that lights an LED through an inverter whose oscillator is a tunnel diode . Dig out the textbook. If you’ve used a thermocouple thermometer or a semiconductor thermoelectric generator then you’ll have encountered the thermoelectric effect . Perhaps you’ve even operated a Peltier cooli...

Full article: http://hackaday.com/2016/03/30/a-ridiculous-way-to-light-...

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