Using scrap and bits from broken things I have built a number of gadgets. Not all of them have a purpose apart from hopefully demonstrating forms of renewable energy and providing something to look at. This is a collection of photos and notes and ideas on things to build and what they could be built from.
Here are a couple of solar powered ‘things’ which just kind of sit there and spin around:
These were made from scrap small solar panels (from returned solar products). The motors are low inertia solar motors (so they start in very low light levels), are available from Opitec. The bodies are made from paper mache, which is then painted and varnished. The rest of the machines were made from scrap shiny things.
The first kids pedal generator was also made from scrap, although it was a learning experience and I would not build one quite like this again: