PDR: 3/27/08 Pinwheel Technologies (C3) Heather Blaha Matt Fuxa Joey King Michael McConnell Domenic Tassoni

Overview Vertical-Axis Wind Turbine Vertical-Axis Wind Turbine Interchangeable Shaft Interchangeable Shaft

Last Week’s Action Items Circuit design and embedded intelligence Circuit design and embedded intelligence Decided on ‘slow drain’ circuit Decided on ‘slow drain’ circuit Microcontroller input will be from ammeter Microcontroller input will be from ammeter

Last Week’s Action Items ctd. Finish ordering parts Ordered all main components Missing: 1 bearing, 1 hand crank, nuts and bolts

Current Status Step One Receive all necessary parts Step Two ? Step Three

This Week’s Action Items ‘Step Two’ Finalize circuit logic

Step Two Order hand crank Order hand crank 24” shaft, 12” square barstock, 6” shaft 24” shaft, 12” square barstock, 6” shaft Welded together, pinned to hub Welded together, pinned to hub

Step Two ctd. Connect hub and shaft Connect hub and shaft Machine flats Machine flats Drill hole for clevis pin Drill hole for clevis pin Mount turbine Mount turbine Drill holes in supporting struts Drill holes in supporting struts Plan the rest of assembly process. Execute as feasible. Plan the rest of assembly process. Execute as feasible.

Circuit Requirements Measure rpms from ammeter input Alert when generator is operating at unsustainable speed (max 10 A) Slow drain battery

Why not charge the battery? Not out to prove technical feasibility of charging a battery Slow drain will prove key deliverables Mechanical functionality Intelligence capability

Updated diagram

Conclusion Can see a tangible product taking shape Can see a tangible product taking shape Identify and execute remaining tasks Identify and execute remaining tasks Next week: 100% identify, execute as much as possible Next week: 100% identify, execute as much as possible