That makes it a pretty great science fair project, but not a very practical flashlight.
40s Step1: How much heat per cm sq our bodies radiate, I found this to be around 5mWI needed only 0.5mw to obtain a good LED brightness.55s Step2: Characterisation of the peltier tiles, I found that both tiles produced sufficient energy but only around 2mV,I needed around 2.5V1:07s Step3: final circuit has only 4 components. I obtained a good LED brightness with less than a 50mV input and around a 50% efficiency.1:20s Last Step: 5mW of power 5 foot candles of brightness
could people use this to move about safely at night
One of the nice things about this, as a "science fair" project, is the fact that most people should be able to reproduce the results.