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in this random rambling thread we post random pictures

it's a self-winding mechanism. The movement of your hand and wrist provide the motion to keep the spring wound (vs a mainspring in a manual watch, or a battery)
I told my daughter about those kind of watches. They're what everyone wore once upon a time. She got the idea of trying to build a kinetic phone charger from it...so she could charge her phone during camping trips :th. But, she had fun trying to figure out how to make it work and won awards at that years science fair with her ideas. Fun memories 😄
 
Jewelry ice Japan.JPG
 
I told my daughter about those kind of watches. They're what everyone wore once upon a time. She got the idea of trying to build a kinetic phone charger from it...so she could charge her phone during camping trips :th. But, she had fun trying to figure out how to make it work and won awards at that years science fair with her ideas. Fun memories 😄
They have solar phone chargers.
 

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