Can any of you think of a way you can replace (electrical)machines in a garden with its mechanical equivalence, while at the same time making its replacement low maintainance?
It can also be decorations. Basically create mechanical stuff that looks good in a garden.
Some devices that may be workable:
+ A water timer that uses a mechanical clock that powers a mechanical valve, and its mainspring is recharged every time the water rushes though it.
+ A passive water pump that is made of a black plastic water bottle and two valves. When hot, the air inside pushes water out. When cool, new water is pulled in by the cooling air. It can be used to pump water slowly to a 'not' so high location.
+ A sterling engine can be used as a more active solar pump to pump water to a higher location, however its use of moving parts means it more likely to break down than the 'passive pump'. If it requires a kick start to run, then place a mini turbine to provide the starting force.
+ Use the above pump to create a fountain
+ Perhaps as a replacement of solar powered markers, get some crystal that emits light when shaken("which quartz i forgot..."), and get it to shake around automatically.
+ Mechanical garden music box would be a nice addition(wind powered music box). Double points if its either reprogrammable, or plays a different instrument such as drums.