Date:         Fri, 24 Jan 2003 11:15:35 -0500
Reply-To:     80 Westy Pokey <pokey@VANAGON.ORG>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         80 Westy Pokey <pokey@VANAGON.ORG>
Subject:      Re: Rear view mirror video overlay project
Comments: To: TJ Hannink <tjhannink@yahoo.com>
Content-Type: text/plain; charset=us-ascii

Tim as cool as this is, why would you need Volta and GPS info
at the same time?

1) Buy a "Y" cable and a video switcher from radio shack for
$20 bucks US or so.

2) Split the video input coming from your rear view mirror
cam with the Y. Send one input into the voltmeter black box,
the other into the GPS black box.

3) Run the outputs of the seperate black boxes into the
inputs of the switcher, run the output of the swicther to
your LCD you are done. You can switch between volts or GPS at
the touch of a button.

Now if you want to get fancy, instead of running the output
of the switcher to the LCD, purchase a 2nd switcher and run
the output of the first switcher to the input on the 2nd
switcher. Buy a DVD player and run its output to an input on
the 2nd switcher. Now you can flip between rear view with
overlay to DVDs no overlay. Unless you want GPS or volt info
on the LCD along with your DVD movies... but your could do
that too by re jigging these options a bit.

Or am I misunderstanding?

Thanks,
Chris

---- Original message ----
>Date: Fri, 24 Jan 2003 07:19:43 -0800
>From: TJ Hannink <tjhannink@yahoo.com>
>Subject: Rear view mirror video overlay project
>To: vanagon@GERRY.VANAGON.COM
>
>I am still working on using the 5.6" lcd screen that is
mounted in place
>of my rear view mirror for other purposes than a viewscreen
for my rear
>mounted camera.
>
>I found a couple of interesting solutions on the web which
would overlay
>text on the composite video signal.
>
>The first uses an RS-232 interface to provide up to 308
characters of
>info. (http://www.icircuits.com/osd-232.htm) The programming
example
>in the photo on the bottom of the page would be a great
starting point.
>
>Another example connects a GPS antenna/receiver and overlays
the data
>on the broadband video signal. (http://www.icircuits.com/osd-
gps2.htm)
>or (http://www.blackboxcamera.com/Stv5730a/gps.htm).
>
>The last example is a digital voltmeter which looks like it
might make
>a great interface for the Digitool.
(http://www.riccibitti.com/dvm.htm)
>
>My ideal overlay would combine the GPS info and Digitool
info for
>overlaying on the video signal. That looks like it would
call for
>some microcontroller programming, circuit design and sensor
building
>(stamps) and I currently don't have that knowledge. Anyone
out there
>with any background in this area willing to help with design
and
>programming?
>
>Thanks,
>
>
>=====
>TJ Hannink
>Goldibox - 1987 Vanagon Camper, Wolfsburg Edition
>Winter Park, Florida
>http://home.earthlink.net/~tjhannink/
>http://groups.yahoo.com/group/wolfsburg_campers
>http://photos.yahoo.com/tjhannink [Vanagon] Album
>
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