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The Comvette Project - diy BOSE Replacement for C4e Corvettes
Project Components
chassis base-plate
chassis face-plate
chassis overlay

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


standoff

Aluminum Hex Standoffs

CRP042044GR Hex Standoff, Aluminum, #4-40 x 1-1/4" Long, Pk 10

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knob

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

Volume control potentiometer. 50K, Non-linear, logarithmic audio taper. Dual (Stereo Audio)

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stereo audio cable

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

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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wiring harness adapter

Wiring Harness Adapter

GWH-342 wiring harness adapter for 1978-1991 General Motors. Plugs into factory harness. Alternates: SH412 / Metra 70-1677-1 / Scosche GM01B

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Visit the Wiring Harness page


usb jack

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 male a to male b

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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touch screen

5" Diagonal Touch-Screen

GeeekPi 5 inch Capacitive Touch Screen 800x480 HDMI Monitor TFT LCD Display

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hdmi angled ribbon

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

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 angled ribbon

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

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

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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DC to DC Converter

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 breadboard

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

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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diodes

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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resistors

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

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

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

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

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

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

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

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 audio extractor

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

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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usb 7 port hub

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

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


irf520 mosfet driver module

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


automotive relays

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


obd1 cable assembly

OBD1 Cable Assembly

Molded GM OBD1 Cable Assembly. This breakout cable exposes all of the Assembly Line Diagnostic Link (ALDL) connections.

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Visit the 160 Baud ALDL page

 

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