Showcase
Take a guitar amplifier but instead of a speaker, use a surface transducer to resonate the body of an acoustic guitar.
A 10 pointed star with green LEDs and red LEDs on alternating points
I recently constructed and tested a working PMA and VAWT. At 40 MPH it will produce 9 amps DC using a 12 volt deep cell for a test load.
A turn-off delay timer module for use with an AC mains load such as a fan or a light