A home built Thermo Electric Generator (TEG) powered by a Candle. It's almost a free energy source.
Also take a look at my other build, a TEG USB Charger: https://www.youtube.com/watch?v=gVeIqsgvfuMlist=UULUvPd1Qo0e6FmzULEbNX6w
It's build by a TEC module, 3V DC-motor, a piece of wood, CPU cooler, Springs,
M4 bolts, Cooling Paste, an old heatsink and some color.
A candle heats up the under heatsink.
The temperature raises and the DC-motor starting to spin the fan.
The fan cools the CPU cooler that low
آی-ویدئو