Recently someone over on the Astromech Builders site designed a way for your R2 to randomly move its head back and forth without outside influence. A really nice little design and a nice little plus for when you have the droid turned on, but it’s not really doing anything…
He provided two different sensor options, but as I have come to expect, MY droid won’t really work all that well with either.
One option was a 3D printed piece in the center of the dome - RIGHT where I have a non-typical (but IMHO quite clever) Qi power source for the lights in the dome itself. After a bit of searching on the 'net and some trial and error with Qi Pads, I finally found one that had internals that were small enough to fit inside the sensor ring.
But how to hold it all together…? Glowforge!
Presenting the Roam-A-Dome Qi combo sensor:
An acrylic backplate to support the two circuits coaxially. Worked like a champ.
The OTHER side is just a sticker that you apply to the inside of the dome - except there’s that pesky Qi pad in the way… Not when you’ve got a Glowforge!
Clearances are hard to manage because with the dome on the body you can’t really get inside to check them. While the Qi system was providing power properly, that sticker was still a bit too far from the sensor ring.
Not only did 1/16" acrylic provide JUST the right spacing, it also protects the Qi Pad!
So now the sensor ring is installed AROUND the Qi power system. Next step is teaching myself how to program the system and learning a little more about radio control systems so I can tie this all in without affecting the radio controls for the dome.