Check out this preview of the upcoming Build R2-D2 electronics, via writer Iain lowson at DeAgostini Publishing.
“More video joy for you all. This is a test of the foot sensor that will later prevent your droid from falling down the stairs. You’ll note that it waits until the edge of the foot is hanging over the fatal drop before reacting. This is a heart-stopping service our engineers have delivered to make your life that bit more exciting. 😉
(Note – that last bit’s a joke. Your droid will be fine.) – Here’s footage of the assembled lightsaber rig for the R2-D2 droid a whole lot of folks are building right now. This thrilling footage will give you an idea of how it works. It even has sound!!! Don’t say I never give you anything.”