(a)
(b)
(c)
(d)
(e)
(f)
Figure 18: Application demonstrations of (a) LCD projector, (b) DVD player, (c) ceiling fan, (d) music box, (e) window-type air conditioner, and (f) split-type air conditioner (Figure 18 is reproduced from Tsai et al. [15] (under the Creative Commons Attribution License/public domain)).