Project Components |
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Comvette Chassis
The chassis base-plate is a custom laser-cut, clear, .118" thick Acrylic plate. It attaches to the original OEM
mounting points for the BOSE head unit using the original OEM hardware. No modifications to your car are required.
The chassis face-plate is a custom laser-cut, clear, .118" thick Acrylic plate. The touch-screen, volume control
and USB jack attach to the face-plate. The face-plate attaches to the base-plate using #4-40 countersunk phillips
screw and 1-1/4" hexagonal standoffs.
The chassis overlay is a custom laser-cut, .059" thick Acrylic two color (black on white) plate. It hides the
assembly hardware on the face-plate behind it. It is etched with with the word "VOLUME" using a font that closely
mimics the OEM font used elsewhere on the dashboard exposing the white substraight behind the black layer. The
white substraight is translucent and can be back-lit if desired to make the word "VOLUME" glow.
Visit the Comvette Chassis page
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Aluminum Hex Standoffs
CRP042044GR Hex Standoff, Aluminum, #4-40 x 1-1/4" Long, Pk 10
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Volume Knob
EHC Knobs Model 3009-2-B, Knurled Plastic w/Metal Barrel and Setscrew, Matte Black, .850" Diameter,
.600" Height, 1/4" Round Shaft. Similar in style to the BOSE OEM knob.
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Volume Control Potentiometer
Volume control potentiometer. 50K, Non-linear, logarithmic audio taper. Dual (Stereo Audio)
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Stereo Audio Cable
3.5mm stereo male to two RCA mono male, 12 foot cable. The male RCA ends are removed and discarded. The cable is then soldered
to the potentiometer. This cable connects the car audio system to the Raspberry Pi or other audio source.
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Ground Loop Isolator
Ground loop isolator. Car electrical systems are inherently noisy. Sometimes when you are
chasing down a strange noise in your audio system, a ground loop isolator is the key to
eliminating it.
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Panel Mount USB Jack
This Panel mount USB jack has a USB B-Female socket on the back and a USB A-Female socket in the
front.
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USB Cable A-Male to B-Male 10 Foot
USB 2.0 Cable - A-Male to B-Male - 10 Feet. The B-Male end plugs into back of the panel
mount USB jack and the A-Male end plugs into the Raspberry Pi or other host.
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5" Diagonal Touch-Screen
GeeekPi 5 inch Capacitive Touch Screen 800x480 HDMI Monitor TFT LCD Display
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HDMI Ribbon Cable
This 10cm HDMI Ribbon Cable with Standard HDMI Female Socket to Standard HDMI Male 90 Degree Angle
Plug is required because of the limited space available. The HDMI 90 degree angled plug is inserted
into the edge connector of the touch-screen and the other end mates with a standard HDMI cable.
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HDMI Cable 10 Foot
10 ft Flat High Speed HDMI Cable. Connects touch-screen to Raspberry Pi or other video source.
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USB Ribbon Cable
This 10cm USB Ribbon Cable with USB A Plug to Micro USB 90 Degree Angled Plug is required because of
the limited space available. The USB 90 degree angled plug is inserted into the edge connector of
the touch-screen and the other end mates with a standard USB extension cable.
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USB Extension Cable 10 Foot
10 ft USB 2.0 A-Male to A-Female Extension Cable. Connects Touch-screen to Raspberry Pi or other
USB host. Carries 5 volt power from USB host to the touch-screen and carries USB HID mouse data
(touch-screen) from touch-screen to USB host.
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Raspberry Pi 3 Model B+
The Raspberry Pi is the heart of the BOSE head unit replacement project. This little microcomputer
runs a full Linux distribution and has enough computing power to handle just about anything your
can ask of it. It also uses very little power and requires very little space, making it a perfect
fit for use in your car.
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2x20 Dupont Connector Housing
Making a large number of connections to the Raspberry Pi GPIO pins can be tedious and error prone.
Instead of making connections one at a time with single pin Dupont jumper leads, why not put all
of your connections into a 2x20 Dupont female connector housing? With this connector housing all
your GPIO connections can be made at once. This makes connectiong and disconnecting your Raspberry
Pi easy and error free. The connector housing even lets you rearrange the connections as your
project evolves.
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DC to DC Converter
The Raspberry Pi runs on 5 volts DC which means that it can't be powered directly from your
car's 12 volt DC system. This little converter takes your car's 12 volt DC as input and provides
a 5 volt DC output. What makes this converter attractive is that it has mounting ears and a
built-in Micro USB cable and connector. It plugs into your Raspberry Pi without the need for
adapters or extra cables.
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Perma-Proto Half Size Breadboard
To assemble the various modules used by the Comvette system like
the Piezo Beeper Module, the DS1307 Real Time Clock and the
TEA5767 FM Radio Module you'll need a way to permanently mount
and connect the modules. The Perma-Proto half size breadboard is
perfect for this. It is big enough to hold several modules and
small enough fit nicely into a compact space. The Comvette
Project also uses this breadboard for the Line-Level Audio Switch
and the Power Manager.
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PCB Relays
These tiny 12 volt relays are used by the Comvette Power Manager
and also by the Line-Level Audio Switch. They are inexpensive and
fit nicely onto a perma-proto board.
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1N4001 Diodes
These are common 1N4001 power blocking diodes. They are great for
kickback protection to safely discharge the spikes generated when
the magnetic field collapses in a relay coil. Without kickback
protection, MOSFET modules used to operate relays can be damaged.
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10K Ohm Resistors
These are common 10K Ohm, 1/4 Watt, 5%, Carbon Film Resistors (pack
of 100). They are great for use with microcontrollers that need a
pull-down resistor on their GPIO pins. Without pull-down resistors,
a GPIO pin may remain active (high) after power has been removed.
With a pull-down resistor, any residual power is drained from the
GPIO pin allowing it to return to its inactive (low) state when
power is removed.
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Bluetooth Mini Keyboard
This iPazzPort 10BTTL Bluetooth Mini Wireless Keyboard with Backlit and Multi-Touchpad is the perfect
size to stow in your center console. It's perfect for those times when you need keyboard access to your
Raspberry Pi. And it's rechargable via an included USB cable.
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32 Gigabyte USB Flash Drive
A 32 Gigabyte USB Flash Drive provides a place to store the Linux OS and all the software applications
it will run. The Raspberry Pi can be easily configured to boot from a Flash Drive instead of an SD-Card.
Flash Drives seem to last longer than SD-Cards and also seem to be faster.
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128 Gigabyte USB Flash Drive
A 128 Gigabyte USB Flash Drive provides plenty of storage space for all of your music and video files.
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Piezo Beeper Module
3V to 5V piezo beeper module with a loud 2kHz BEEEEEEEEEEEEEEEEEP. This beeper has driver circuitry
built-in that makes it oscillate at 2kHz. Comvette uses this to make beep sounds when touch-screen
buttons are pressed.
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DS1307 Real Time Clock
The Raspberry Pi does not have a built-in hardware clock. It sets its clock by contacting an internet
time service. So what happens when your Raspberry Pi is on-the-road and doesn't have an internet
connection? Well, it runs but its clock will be wrong. This little clock module provides the Raspberry
Pi with a real-time hardware clock. It communicates with the Raspberry Pi via the I2C bus.
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TEA5767 FM Radio Module
This module provides an FM tuner that can be controlled by the Raspberry Pi via the I2C bus.
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Antenna Extension Cable
The Metra 44-EC144 144-Inch Antenna Extension Cable is used to extend the cars antenna cable from
the area behind the dash to wherever you will be installing your Comvette Infotainment system.
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HDMI to HDMI + AUDIO (HDMI Audio Extractor)
The HDMI to HDMI + AUDIO (HDMI Audio Extractor) allows the
audio portion of an HDMI source to be extracted from an HDMI
source. Most Raspberry Pi HDMI touch-screen displays don't have
built-in speakers to play the audio portion of the HDMI source.
So, to access the audio an HDMI audio extractor is needed.
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USB GPS Receiver
The GlobalSat BU-353-S4 USB GPS Receiver appears as a serial device to the Raspberry Pi making it
really easy to receive an endless stream of GPS data. The Comvette program records the GPS data to
a log which you can later review. You could even upload the data to Google earth and see your
road-trip displayed on their maps.
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Powered 7 Port USB Hub
A Powered 7 Port USB Hub is used to connect peripherals to the Raspberry
Pi and also to power the raspberry Pi. The USB hub is powered by the cars
12 volt system. The hub ports are populated like this: 1:Raspberry Pi,
2:Touch-Screen, 3:In-Dash USB Jack, 4:USB GPS Receiver, 5:HDMI Audio
Extractor, 6:Unused, 7:Unused.
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Adafruit Trinket
The Adafruit Trinket is used in our Power Manager. It is a very small microcontroller that uses
very little power. It can be powered directly from the cars 12 volt system. The 3 volt version of the
Trinket must be used when connecting to a Raspberry Pi's 3 volt GPIO.
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Visit the Power Manager page
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IRF520 MOSFET Driver Module
The IRF520 MOSFET Driver Module is used in our Power Manager. It is a very inexpensive MOSFET
module that is Raspberry Pi compatible. The module is designed to switch heavy DC loads from a single
digital pin of your microcontroller.
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Visit the Power Manager page
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5-Pin 30/40A 12V SPDT Relays
These 5-Pin 30/40A 12V SPDT Relays are used extensively in automotive
applications. They are used by Comvette to control system power,
and also to control the electric antenna and BOSE amplifiers.
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Visit the Power Manager page
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