We have 4 headrest screens
in this truck; the DNN does not have HDMI output. Or rather it will not output
what is on the input of the HDMI. WOW this sucks.
So, we started by contacting
(Matt) Matthew Yerger and Ed Meenan of Kenwood. Our plan was to get an HDMI
splitter (turn one HDMI cable into two). Take one of the resulting cables and
feed it into an HDMI to composite cable and pipe that to all the rear screens.
Now both these items
(splitter and converter) have 120 volt power supplies (actual units run off of
9 volts and 7 volts). So we had to install a 120 volt power supply (easier and
safer then building two different power supplies for these pieces.)
Ok, my guys at electronics
depot got them installed. Everything seems to be working great.... well almost.
Every time the HDMI splitter gets powered up, it if has an hdmi connection, it
will not output. Well at very least we will have one HDMI connection all
the time and the nature of the hdmi cable is pretty prohibitive to interrupting
it (cutting the actual cable with a relay device).
Now what?!?!?! We the
best solution we could come up with involved using a PTR 7 to act as a turn on
delay circuit. It has to have a 50 second delay before it will work properly,
and you have to wait 50 seconds to plug in the I-phone 5.
Alternatively if you ditch
the HDMI completely you lose some connectivity of the phone...so this is the
solution. For any of you thinking about trying this I would recommend
against it, a lot of moving parts and chances for something to break.
Thank goodness we have a
great customer that is very understanding about all of this stuff.
-On a side note, after all
is said and done Matt Yeger said "yeah there is no really good way to do
this yet." We figured it out...just not easy (I am hoping for
reliable).
This got complicated and a little weird so
if you have any questions please feel free to email me.
Patrick Siebert
Electronics Depot
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