Brilliant Newfoundlander Invents the Solution! Hydropower from Reuse. Reused: a small stepper motor as found in a printer 2 discarded CD-ROMs a foam tray some long stick (I used a piece of 20mm diameter PVC tube from demolition) a LED one or two tie-wraps a small piece of scrap paper Non-reused: The only non-reused part is the hot melt glue (I recommend the low temp type, especially when working with kids).
Tools: scissors, screwdriver to disassemble the printer (not shown), cutting pliers or desoldering tools for (optional, not shown). Building a Parabolic Solar Hot-Water Heater using 123D. My first step was to do a calculation to figure out if my idea was crazy.
I started with my goal: Make the solar equivalent of the hot-water tap on a coffee machine. How much power do I need?