If you're like me, you probably have a box full of assorted power
adapters for your vehicle that you've collected for your phones, MP3
players and navigation units. Thankfully, in the last couple of years
many device manufacturers have started migrating to standardized mini or
micro-USB charging connectors, allowing you to plug in nearly all your
devices into your computer to charge.
But we still need to charge devices when we're on the road and if you
don't have a newer car with a built in USB port you're back to adapters.
Fortunately, the good people at Instructables have come to the rescue
with a step by step guide to adding a USB power port to your car. You'll
need a $1.16
USB
charger from which to scavenge the port, and we highly recommend
Monoprice.com for all your
ultra-cheap cable and charger needs. Even if your car already has a port
for an iPod interface, you may want to add one or two extras just for
charging other devices. So that's your weekend project. Get started!
Step 1.
Finding a location for
the USB power plugIn the 2010 Prius III there is an unused
outlet next to the 12volt aux power in the front center console. Disassemble the center console and remove the plastic housing of the
blank outlet and the 12volt aux.
Step 2.
The USB 12 volt car adapter
Disassemble a Dynex USB power adapter and remove the circuit board
from the plastic housing, then remove the 12 volt supply wires. The
supply wires were springs and such, and too bulky to reuse.
Step 3.
Preparing the blank
cover
To fit the USB power circuit in it, a lot of
the plastic needs to be cut out. Using an Exacto knife, and a box
cutter, clear the inside of the cover.
Step 4.
Fitting the USB circuit
board
Use a Dremel tool with a grinding attachment to slim down the USB's
circuit board until it slides into the hollowed out cover. Once the fit is right, make the hole on the face to access the USB
plug.
Step 5.
Making the hole for the
USB power
Approximate the center of the USB plug and drill a tiny hole through
the face of the blank accessory plug.
Step 6.
Wiring
Once you trim the opening, wire the 12 volt power to the
USB adapter. Since the 12 volt accessory is right next to it,
solder the ground from the USB board to the cigarette adapter, and
attach the positive end to a nut on the back.
Step 7.
Fixing the LED
The USB board has a 2 color LED to indicate power and charging. You may want
the light to shine behind the USB plug, so de-solder the LED and
reposition it to face forward. You may have to add some wire to the board to
attach the LED, but it shouldn't be hard, and could be done by a beginner.
Step 8.
Securing the USB board
After making sure the 12 volt accessory and USB power are working, the
package needs to be glued into place to prevent it falling back into
the center console. Use a general auto glue that holds tight, but
remains slightly flexible.
Step 9.
Final install
Let the glue cure overnight. After testing the power out one more
time, slip the plastic housing back into place. Nice!