I had a lab assignment a couple of years ago where we
tried that. Our lab boards had a single row of LEDs
and the handout said to "shake our head back and forth
to see the pictures," but the only result was a mild
headache and the realization that shaking the project
board back and forth worked better anyways.


--- Lindy Mayfield <Lindy.Mayfield@EUR.SAS.COM> wrote:
> Thanks for the info, I'll check that out.
>
> Sorry, perhaps I wasn't specific about my "idea".
> (-:  I meant I thought I could maybe do one where
> you have to look at it and shake your head NO! over
> and over to read it.
>
> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Jinx
> Sent: Sunday, May 23, 2004 12:07
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC:] Single Row of LED's Illusion -
> How they do that?
>
> > To be more specific, I had the idea of seeing if
> it would work with
> > just a row of lights in one place and you have to
> move your head
> > to read it
>
> I don't think so, unless you have more eyes than a
> spider and you
> can select which one(s) is looking at the LEDs
>
> The effect is similar to how a dot matrix print-head
> makes characters
> with a line of pins. Where the pins struck the paper
> and made a mark
> is the record of where they were. LEDs "print heads"
> use the principle
> of persistence of vision, like a film strip or
> flip-book. Each frame is a
> single static picture but run quickly in succession
> gives the impression
> of a dynamic display
>
> Bob Blick's Propellor Clock is a good place to start
>
>
http://www.bobblick.com/techref/projects/propclock/propclock.html
>
> Google for "propellor clock" to get other examples,
> or eg "message
> wand"
>
> http://www.salient.com.au/led_MessBar.htm
>
> --
> http://www.piclist.com hint: The PICList is archived
> three different
> ways.  See http://www.piclist.com/#archives for
> details.
>
> ---
> Incoming mail is certified Virus Free.
> Checked by AVG anti-virus system
> (http://www.grisoft.com).
> Version: 6.0.663 / Virus Database: 426 - Release
> Date: 4/20/2004
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system
> (http://www.grisoft.com).
> Version: 6.0.663 / Virus Database: 426 - Release
> Date: 4/20/2004
>
>
> --
> http://www.piclist.com hint: The PICList is archived
> three different
> ways.  See http://www.piclist.com/#archives for
details.





__________________________________
Do you Yahoo!?
Yahoo! Domains   Claim yours for only $14.70/year
http://smallbusiness.promotions.yahoo.com/offer

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body