A very interesting design concept on youtube. Im not sure if it has been posted before but here it is.
http://video.google.com.au/videoplay?docid=3496956186892095206&q=Flux+Gating+Generator (http://video.google.com.au/videoplay?docid=3496956186892095206&q=Flux+Gating+Generator)
http://video.google.com.au/videoplay?docid=7914711626037688624&q=Flux+Gating+Generator (http://video.google.com.au/videoplay?docid=7914711626037688624&q=Flux+Gating+Generator)