Complicated Clock Car Computer / AKA 06/03/2019 20190128-carpi.html?print-pdf#/slide- orge963a6a...

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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

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Github

map7777@gmail.com

@map7

github: map7