Hi, I'm looking for some early inout and feedback on a project I have been thinking about lately. See below for background and questions. Your input would be very welcome.
The idea I'm thinking about building a small windmill on the balcony to power my arduino, or (better) an ATtiny85. The idea is to collect energy from the windmill and store it in a capacitor. When the capacitor is full, it will somehow discharge and power the microcontroller which does some kind of computation (still to be defined what, but let's say blink an LED).
The approach My basic idea is to glue magnets to a disc and have them rotate over some coils to generate electricity when the wind turns the mill. The electricity will go into a bridge rectifier and then into the capacitor as described above.
To get me started I already bought these - Bridge rectifier http://www.kjell.com/content/templates/shop_main_details.aspx?item=90050&path=239000000,266000000,268000000 - 4 x Ring magnets http://www.supermagnete.de/eng/R-15-06-06-N
I also have a 5V super capacitor lying around somewhere.
A - Is this feasible? Is there a better way to do this? General thoughts?
B - What kind of coils and how many should I use? 1 coil? 2 coils? 4 coils? How should I hook them up to the rectifier? Where can I source the coils? Make myself? How?
C - Any pointers to similar projects? I did some naive googling, but didn't find anything useful. I bet I'm not the first though. All/any pointers welcome