I bought a 12 x 18
inch sheet of 22 gague steel at the local hardware store (about
$4.95). After first making a prototype bay out of poster board,
I cut the steel. This can be done either with hand cutters or a
metal-cutting blade and a jig saw. If I had it to do again, I'd
use the jig saw for the whole operation.
After making the bends, I secured
the corner flaps with a 4-40 screw, lockwasher and nut on each side.
I painted the panel face a bright silver and the rest of the box
a dark gunmetal, the same as I had done with my programming bay.
The photos at right show the finished unit with upper and lower
Next I attached the stereo’s
mounting sleeve to the bay ceiling. To maintain the 1.25 inch distance
from the top, I used nylon spacers.
Once I slipped the stereo in, I fashioned a mounting strap out of
scrap steel and attached this to the center screw in the bay’s
The bay is held in place inside the
torso with two screws attached to the torso’s side with epoxy
putty. The unit is well balanced with the stereo installed,
and I found that I didn’t need to anchor it at the base.
For the actual stereo, I choose the
Dual XD6210. It has CD-R compatibility, AUX rear inputs and preamp
output, as well as a wireless IR remote for less than $100.
If the idea of cutting and folding sheet metal discourages you from
adding this detail to your robot, B9 Club member Mike Lynch now
makes and sells this bay based on my design. It's also suitable
for use as a side bay with many creative uses. Click
here for more details about buying a rear bay ready made.
to the B9 Robot Resources home page