It seems that the author of the article introduced an AC signal (50 Hz HUM)
into an analog input or sensitive counter input.  I did not read the
article, but that is a trick that I have used many times to see if a signal
is amplified or at least detected.  We are a pretty good antenna and we pick
up the AC HUM and transfer it to an input quite easily.  I would definitely
be suspicious of the circuit.

Recheck your work.  Look for something perhaps left undone,

Good luck,
Rich
----- Original Message -----
From: "Rodrigo Valladares P." <r-vallad@UNETE.CL>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Thursday, December 26, 2002 12:42 AM
Subject: Re: [PIC]: EPE Tachometer


> Hi,
>
> this is a copyrighted article or it an be shared? (if it's not
> copirighted, is in the web?) thanks!
>
> i  think that the tachometer *can* read 1500 rpm, not necesary true.
> recheck what you have done and put in the car, welcome to the real world!
>
>
> RVP.
>
>
> Jose wrote:
>
> >Hi,
> >
> >Has someone tried the EPE magazine pic tachometer??, I have assembled it
and when it power up it shows 0, that is OK, but in the magazine article
they say that when you toch with your hand the input you will give to the
circuit 50 hz signal, that will read as 1500 RPM, when i do that nothing
happens. I have not tried it in the car yet, but im afraid that something is
not working
> >
> >I will apreciate any info.
> >
> >Thanks, and Merry Christmas !!
> >
> >--
> >http://www.piclist.com hint: The PICList is archived three different
> >ways.  See http://www.piclist.com/#archives for details.
> >
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.

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