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GVIF for Android Auto - shimmer on screen when engine running

XK / XKR ( X150 ) 2006 - 2014

GVIF for Android Auto - shimmer on screen when engine running

 
  #1  
Old 05-08-2019, 04:34 PM
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Default GVIF for Android Auto - shimmer on screen when engine running

I've had a few attempts to get Android Auto onto the OEM screen via GVIF over the years and now think I have a good solution. I'm using the standard GVIF used by a few members of this forum, Crankshaft (Android Auto head unit) running on Raspberry Pi and a rotary encoder for control. I'll share more details on the build once I'm done.

I have an electrical issue that I'm hoping more expert members can help me with. When taking power for the GVIF and RPI from the same source (the unused switched 12v plug in the boot area on the left hand side) I get shimmer on the screen when switched to the RPI source (attached) a pic. It's fine when the engine isn't running or if I power the RPI from one of the 12v accessory plugs in the cabin. I'd really like to power both from the switched 12v in the boot though. What am I doing wrong?

The wiring is like this (I've tee'd power from the input of the 5v USB socket directly to the GVIF) - please don't shout at me. I'm doing my best.

12v switched --- 5v USB socket --- Raspberry Pi
12v switched ---------------------------- GVIF




Piggy backing onto these connectors for power to GVIF

 

Last edited by LockNumber25; 05-08-2019 at 04:48 PM.
  #2  
Old 05-08-2019, 04:50 PM
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I don't have that problem, but I also used a stand-alone power supply to provide the necessary current instead of tapping from somewhere else.

https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1

That may help, but then again it may be totally unrelated.
 
  #3  
Old 05-08-2019, 05:01 PM
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Sounds like you need a filter on the power to the GVIF, maybe something like one of these:

https://www.amazon.com/Legacy-Noise-Suppressor-Eliminates-Interference/dp/B0007LCKZA/ref=pd_cp_107_2?pd_rd_w=0pWtZ&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=S2ZMK6KBEAFS6QZV7JRV&pd_rd_r=f9631f82-71db-11e9-88f1-c5c4d7a27c00&pd_rd_wg=5MZ5r&pd_rd_i=B0007LCKZA&psc=1&refRID=S2ZMK6KBEAFS6QZV7JRV https://www.amazon.com/Legacy-Noise-Suppressor-Eliminates-Interference/dp/B0007LCKZA/ref=pd_cp_107_2?pd_rd_w=0pWtZ&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=S2ZMK6KBEAFS6QZV7JRV&pd_rd_r=f9631f82-71db-11e9-88f1-c5c4d7a27c00&pd_rd_wg=5MZ5r&pd_rd_i=B0007LCKZA&psc=1&refRID=S2ZMK6KBEAFS6QZV7JRV

https://www.amazon.com/PAC-CSS12-Passive-Filter-Capacitor/dp/B000CEDZBA/ref=pd_cp_107_1?pd_rd_w=0pWtZ&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=S2ZMK6KBEAFS6QZV7JRV&pd_rd_r=f9631f82-71db-11e9-88f1-c5c4d7a27c00&pd_rd_wg=5MZ5r&pd_rd_i=B000CEDZBA&psc=1&refRID=S2ZMK6KBEAFS6QZV7JRV https://www.amazon.com/PAC-CSS12-Passive-Filter-Capacitor/dp/B000CEDZBA/ref=pd_cp_107_1?pd_rd_w=0pWtZ&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=S2ZMK6KBEAFS6QZV7JRV&pd_rd_r=f9631f82-71db-11e9-88f1-c5c4d7a27c00&pd_rd_wg=5MZ5r&pd_rd_i=B000CEDZBA&psc=1&refRID=S2ZMK6KBEAFS6QZV7JRV

https://www.amazon.com/Axxess-AX-ANR1000-Inline-Power-Filter/dp/B0049MWUMQ/ref=pd_cp_107_3?pd_rd_w=0pWtZ&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=S2ZMK6KBEAFS6QZV7JRV&pd_rd_r=f9631f82-71db-11e9-88f1-c5c4d7a27c00&pd_rd_wg=5MZ5r&pd_rd_i=B0049MWUMQ&psc=1&refRID=S2ZMK6KBEAFS6QZV7JRV https://www.amazon.com/Axxess-AX-ANR1000-Inline-Power-Filter/dp/B0049MWUMQ/ref=pd_cp_107_3?pd_rd_w=0pWtZ&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=S2ZMK6KBEAFS6QZV7JRV&pd_rd_r=f9631f82-71db-11e9-88f1-c5c4d7a27c00&pd_rd_wg=5MZ5r&pd_rd_i=B0049MWUMQ&psc=1&refRID=S2ZMK6KBEAFS6QZV7JRV

Amazon Amazon
 
  #4  
Old 05-08-2019, 05:12 PM
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Awesome - thanks guys. Is that consistent with moving the RPI to a different power outlet making the problem go away? The shimmer is only seen when power RPI and GVIF share the same 12v source.
 
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Old 05-08-2019, 05:53 PM
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I sourced my android media box power from the socket in the glovebox (actually spliced in from behind the glovebox and also used a converter like Cee Jay) . No issues such as yours.

Looking forward to a demo video....
 

Last edited by Sean W; 05-08-2019 at 06:01 PM.
  #6  
Old 05-09-2019, 03:14 AM
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Thinking of sighting the RPi under the arm rest and take power from the USB next to the iPod connector. Anyone know how many amps that can provide? Sean W Hi Sean, haven't forgotten the help you gave me with this last year. Thanks again. Will do a video and write up once done.
 
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Old 05-09-2019, 08:57 AM
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portable audio interface has a 10 amp fuse I think. USB is fed through that.
 
 
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