Originally posted by: DrPizza
Alternate solution (without looking at the video) - a thermocouple produces a very small current. I don't know what size motor you're talking about. However, there's enough energy there to operate the controls on your hot water tank.
First let me describe what's happening in the video.
The demonstrator is taking two large nails (probably 60 penny) and pressing them into the side of large (drinking glass size) candles. Making the notation of NOT going all the way through. Then they magnetize each nail (using a very bad technique I may add).
Alligator clips are connected to each nail and then connected to a small incandescent bulb at first. When the second candle is light, the bulb glows brightly as if it were wired to a lantern battery. (because it is!)
Second part of the demonstration uses a small permanent magnet motor one might find in a toy car. Again when the second candle is lit, the motor runs. (and again it does this because the person is reaching under the table and closing a knife switch)
Anyone that's been taught science at a sixth grade level should understand that this is total bullsh!t. :|
Second, yes the Seebeck Effect observed in thermocouples can generate
feeble amounts of electricity, but never enough to power an incandescent bulb or a small motor. At least not with a single junction thermocouple used in an appliance safeguard flame control.
Many years ago they did have thermoelectric generators that could power a transistor radio from the heat of a kerosene lamp. And if you know what you're doing you can actually listen to radio with no power at all. Google crystal radio set once.
🙂