In order to display it we are planning to use... dare i say it... a head up
display - ie, the pic drives a specially set up LCD display, which has the
display inverted so that a light can be shone through the digits which are
not electrified (as all of the back - except for the digits- has been
masked) and it will be reflected off of the windscreen.

E-mail       Pezzer@myhouse.force9.net
Web          homepages.force9.net/myhouse/index.html
UIN            196253

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> From: Bryan Hord <bryan@WLLINK.COM>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: spedo type thing
> Date: 01 March 1997 02:14
>
> What are you planning to use for a readout/display device?  I've thought
> about this but I never came up with a display device that was as easy to
see
> and read as a standard speedo.  Maybe rotating (fixed rate) pointer with
> super bright LEDs a-la Bob Blicks clock might work well.
>
>
>
> At 05:23 PM 2/23/97 -0000, you wrote:
> >Hi.
> >I plan to attempt to make a spedometer type thing.
> >It's input is from a hall switch, which is passed by a magnet once per
turn
> >of the wheel.  I need a unit to take this sensory input and display the
> >speed on an LCD display.
> >I was thinking that the prog would revolve around...
> >        wait for a pulse
> >        time until next pulse
> >        divide the distance round the wheel by the time between the two
pulses
> >        display it...
> >
> >I was planning on using a pic16C84 as it is easy (and cheap) to program.
 I
> >have very little experience with PICs, my main use of assembler based on
> >6502.
> >
> >I was wondering if in the 16c84 there is a timer capable of this task,
and
> >how i would use it (preferably in mpasm).
> >
> >Thanks,
> >        Daniel.
> >
> >
>
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> bryan@wllink.com
> Wireless Link Corporation
>
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