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Car Computer / AKACar Computer / AKAComplicated ClockComplicated Clock
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New CarNew Car
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Problem: Broken ClockProblem: Broken Clock
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IdeaIdeaCreate a car computer to act as a clock!
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Other featuresOther featuresOther features of my Complicated Clock could be
Dash CamReverse CamBluetooth Audio streamingODB2 diagnostics and readoutTemperature readings inside/out
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ChallengesChallengesPowerMounting screen & computer
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HardwareHardwareComputer Raspberry PI 3B+
UPS PiJuice
Screen 5in PI Screen
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PiJuicePiJuice
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IncludesIncludesRTCBattery for up to 5hrs running time (LiPo 1820mAh)Shutdown scripts3 x Programmable buttonsStackable GPIO
https://core-electronics.com.au/pijuice-hat.html
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Power adapterPower adapter5Volt 3Amp Adapter (not included)
https://www.altronics.com.au/p/m8630-powertran-qc3-4.8a-5v-dc-car-dual-usb-adaptor/
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5" Screen5" Screen
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Z6513Z65135 inch screen$80 on special800x480Touch supportHDMI input
https://www.altronics.com.au/p/z6513-5-inches-800x480-lcd-touchscreen-for-raspberry-pi/
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IssuesIssuesFoggy looking in direct sun due to overlay & brightnessNo hardware brightness controlHDMI cable is in the way
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Raspberry PI 7inchRaspberry PI 7inch
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7inch features7inch featuresRibbon cable inputBetter touchscreen (Capacitive touch)Wider viewing angle 70 degreesLarger
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Measure & PlanMeasure & Plan
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Dash holeDash hole
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Measure: Dash holeMeasure: Dash hole
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First thoughtsFirst thoughts
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Final planFinal plan
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Front viewFront view
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Side viewSide view
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Mocking PrepMocking Prepcardboardstrap brace (0.5mm galv)double sided tape
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StructureStructureUsing cardboard I could quickly create the structure using a pair of
scissors and double sided tape on brackets.
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End result lookEnd result look
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Bracket makingBracket making
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ProcessProcessUsing strap brace I could easily:
bend (using a vice and hands)cut (with tin snips)mount (small screws in pre-drilled holes)
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TestTest
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Make longerMake longer
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BendBend
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CablingCablingNeeded to extend the ribbon cable.
Ribbon cable (40pin)40 pin female header26 pin male header surface mountexperimenters boardlots of coloured cable
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ProblemProblemCouldn't �nd the correct headers
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PreparePrepare
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Press ribbon headers with vicePress ribbon headers with vice
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Solder surface mountSolder surface mount
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Solder onto screenSolder onto screen
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End of cablingEnd of cabling
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RisersRisersTo attach the 5in screen to the front
Parts
1mm Aluminium strap (can cut with tin snips)
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Finding a riserFinding a riserToo big, nothing exists.
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Making my own risersMaking my own risers
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Attaching risers to screenAttaching risers to screen
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Problem!Problem!Couldn't screw these small risers on.
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SolutionSolutionUse a longer rail riser design
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Final attachmentFinal attachment
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FM TransmitterFM TransmitterRaspberry PI can act as a FM transmitter with no extra hardwareCould use to transmit music/phone calls/etc to car stereo
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InstallationInstallationConnect cable 30cm to GPIO4
Install fmtransmittergit clone https://github.com/markondej/fm_transmitter
cd fm_transmitter
make -j4
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RunRunSample wav �le is provided
sudo ./fm_transmitter -f 98.0 acoustic_guitar_duet.wav
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Use MP3Use MP3Must convert �rst
sudo apt install sox libsox-fmt-mp3
sox Visigoth\ -\ Final\ Spell\ -\ 01\ Creature\ of\ Desire.mp3 -r 22050 -c 1 -b 16 -t wav create_
sudo ./fm_transmitter -f 98.0 ~/Music/Visigoth/Visigoth\ -\ Final\ Spell/create_of_desire.wav
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Future PlansFuture Plans5" touch displayClock (Using RTC & dclock on 5in display)Outside temp readoutInside temp readoutODB2 readouts (for diags)Stream audio (either to a radio station or through a tape deck toaudio plug)Bluetooth streaming (from mobile through to the cars audio)Navigation (Display maps with USB GPS I have somewhere)Dash camReverse cam with a tap of a buttonAdd Data sim and tracking ability
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ReferencesReferences
- old but still worth it
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BookmarksBookmarks
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QuestionsQuestionsEmail
Github
@map7
github: map7