Finally finished. The thing that slowed me down was whether I should add a wheel, roller, or knob to scroll web pages. I decided against it. An aluminum bracket and a piece of phenolic resin was made to mount the circuit board. The case is made of 5/8″ thick white oak, with brass screws. It measures 11″ x 11 5/8″ x 4 5/8″. The only other thing that may need adjusting is the height of the ball. It could go higher. Now I need to load Missile Command into MAME and play it the way it was meant to be played, with a gigantic trackball. For full history of this project goto my blog http://blackheartindustries.com/ and click “Trackball” link to the right.

All the electronics are now finished. The only thing I have reservations about is that I use the wheel on my mouse quite often. A roller attached to the case below the wrist could serve as a wheel and a rest. Alternately, the ball as a switch could be used to change the function of the Y-axis. I’m going to live without the wheel. Measurements have been made. Next I’ll bring the clear plastic top piece and a button to the wood shop, for reference. The plastic will be used as a router and hole templet. For the previous posts goto http://blackheartindustries.com/