engr 112 special design project: a practical …...second (final) print: higher quality. ~6 hours,...
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ENGR 112 Special design project:A practical application
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Inspiration for the project
● Sony Xperia Z: Water-resistant phone● Existing dock has limitations
Copyright Sony Mobile Communications Inc
*not a suggested use
A more capable charging station
● Phone accepts 5VDC via 2 contacts
Copyright Engadget
Choice of components
● USB breakout board● Pogo pins● Makerbot 3D printer w/
PLA material Adafruit Industries
Designing for the 3D printer
● 100 micron (0.04in) precision: Slow prints● Less material is better● Reinforced screw holes● Support material & considerations
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Design features
Incremental revisions
● Reduced depth, smaller tines
● Holes for machine screws
● Draft print: pogo pins didn't meet charging pads
● Second (final) print: Higher quality. ~6 hours, 50g of material
● Cost less than $3 in plastic
Total cost of project
Part Cost
Phone dock 3D prints $5.40 (estimated, two prints)
USB board $1.50 + $9.09 shipping
Pogo pins $1.90 + $4.01 shipping
Total parts cost $8.80 Total shipping $13.10
Cost of a Sony brand dock: $15 to $20 plus shipping