CAD Assembly
*All dimensions in mm
For the enclosure of our device, we wanted to utilize inexpensive, robust materials. Therefore, we decided to use 1/4" Duron for structural integrity. Using a laser cutter, we created custom panels that could fit together like a 3D puzzle with holes and cutouts for components, LEDs, our LED display, and wires. The panels were sealed together with super glue, except for the back panel and the panel above the steering wheel for easy access to the internal electronics.
Steering Wheel
Our main module consists of a steering wheel which we 3D printed to more accurately represent the form factor of James Bond's classic Aston Martin DB5 steering wheel.
The steering wheel is used to rotate a potentiometer located inside the enclosure. A 1/4" diameter D-shaft is attached to a hub that is screwed into the center of the wheel. This shaft is supported by a flanged ball bearing press fit into the front panel and connected to the potentiometer shaft with a 1/4" to 1/4" shaft coupler. The potentiometer is supported by a 3D printed part screwed into the panel directly below it.
IR Handgun
The next part of our gadget incorporates a toy handgun that triggers an IR LED coming out of the barrel to "shoot" a target IR transistor. We modified an off the shelf toy gun by exploiting the metal contact made when the trigger is pulled to send a signal to our PIC32. An image of the inner mechanism is shown below.
FINAL PRODUCT
Finally, we added a few decorative items to complete the image of our gadget. Our title was made using a vinyl cutter with white sticker vinyl. The 007 logo, which serves as the source of the bullet on our LED matrix, was cut from 1/4" Duron. Lastly, the indicator mounted to the servo and pointing to the various LEDs was laser cut from birch plywood in the shape of the Aston Martin DB5.