Step 1: Purchase Materials
-2 SPST momentary switches from RadioShack
-1 RadioShack Project Box
-1 Mobility USB 2.0 Travel Hub (staples SKU #564851)
-1 GE retractable keypad (staples SKU #603891)
-1/16" sheet steel
-1 superpad extra large mousepad (staples again)
I also used:
-3m super 77 spray adhesive
-conductive epoxy (if you're prepared)
-hot glue and a circuit writer pen from radio shack (if you're down and dirty)
I'll add part numbers soon, but thats what I needed.
for tools, I used:
-a table saw
-an adjustable wrench
-basically, a well stocked workbench.
OK, now lets get down to buisness.
Step 2: Remove All Casings
Step 3: Connect Wires to the Keypad
you can now cut the film to size, and use conductive adhesive (or a circuitwriter and hot glue if you're lazy like me) to connect 1 lead to trace 2, 2 leads to trace 5, and 1 lead to trace 6.
at this point you can connect everything and test.
touching 2 and 5 should yield a 6, or a right arrow
touching 5 and 6 should yield a 4, or a left arrow
disconnect and continue...
Step 4: Cut and Drill
you'll also need to cut down some posts to fit everything inside.
really, cut and fit to feel... and take your time
Step 5: Cut the Base
also measure and cut your non-slip surface (the mousepad)
measure large; its almost impossible to cut a mousepad exactly
Step 6: Assemble the Innards
then, connect the switches, solder, and screw it shut.
Step 7: Test
Step 8: Add Nonslip Base
Step 9: Admire Your Handiwork
i.e. use the infernal contraption, and enjoy.