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Solar powered Tibetan prayer wheel circuit

There are all kinds of toys and fun gadgets around the house for most people that might work or be broken, but either way most people wouldn’t know how do they work inside. For example take this solar powered Tibetan prayer wheel. There are many of these out there, and found one at home lying around as well. It didn’t seem to work, and thought why not take apart to take a look?

Solar powered Tibetan prayer wheel
Solar powered Tibetan prayer wheel

The inside of this Tibetan prayer wheels is pretty straightforward: taking off the bottom cover out come two ballast stones, and drivebox with a solar panel hanging off it. The drivebox is connected to the prayer wheel outside via a rectangular shaft to turn it.