4 ms·
Not to complain, but how much light does it really produce ? Cause this would be very neat ... but I still need to be able to light the room :)
by Qantourisc 13y ago
Not to complain, but how much light does it really produce ?
Cause this would be very neat ... but I still need to be able to light the room :)
- fjarlq 13y agoFrom her project description[1]: My objective in my project was to create a flashlight that runs solely on the heat of the human hand. Using four Peltier tiles and the temperature difference between the palm of the hand and ambient air, I designed a flashlight that provides bright light without batteries or moving parts. My design is ergonomic, thermodynamically efficient, and only needs a five degree temperature difference to work and produce up to 5.4 mW at 5 foot candles of brightness. 5 foot candles is about 54 lux. 30 to 50 lux is minimal illuminance for reading. [1] http://www.googlesciencefair.com/en/projects/ahJzfnNjaWVuY2VmYWlyLTIwMTJyRAsSC1Byb2plY3RTaXRlIjNhaEp6Zm5OamFXVnVZMlZtWVdseUxUSXdNVEp5RUFzU0IxQnliMnBsWTNRWXA2ZVVBZ3cM http://www.googlesciencefair.com/en/projects/ahJzfnNjaWVuY2V...
- Qantourisc 13y agoThanks