68HC705V12

[dzorde]

Sure I'm interested.  Post it to the project list or directly to me (mind
you, my mailer can only handle 500k at a time).  I've currently got a
non-micro based digital dash using 7-segment displays, as well as a 70 led
bar graph tacho.  Works great, except when the sun shines on it.  Which is
why I want to design a new one.

For the new one I thought of a colour graphics LCD (240x 180 size) showing
speed, tacho and odo, all other readings are push button activated unless
warning limits are exceeded, then they auto display.

Does anyone know if a colour graphics LCD would be too slow for updating,
the ones I've worked with you could see when rewriting the display (don't
know if that was due to software overhead though) ?

Dan     dzorde at geocities.com

>I designed a six digital "analog bar graph" gauge dashboard, complete with
>large 199 mph speedometer, mileage (including 10ths) that will easily attach
>to either a parallel port on a PC, or to a 68HC11E9 (or other microprocessor
>that has a 8-bit parallel port output).  I haven't built it, however you are
>more than welcome to take a look at it.  Its in autocad's DXF format, and
>unfortunately, too large to convert to a GIF or JPEG, at least with the
>crappy shareware I have.
>
>I didn't do a Tach yet...
>
>Basically, I took the 8 bits and divided them into two 4-bit nybbles, the
>high order nybble being the "gauge select" and the low order nybble being the
>graph value, which the electronics then latch and will hold the display.  I
>intended to use red rectangular LEDs for the "warning" areas of the graphs,
>Green for the "okay" areas, and blue or yellow rectangular LEDs to indicate
>the center and endpoints of each graph so they mean something.  This is just
>a display circuit, the microprocessor would have the responsibility and
>required programming to convert an analog signal (i.e. oil pressure) to what
>the guage will display from end to end.
>
>Fred
>
>----------geoboundary--
>