[Shotimes] BARO sensor

[Ian Fisher]

I think my neighbors would finally think I've lost it
if they see me hooking up my car to one of my guitar
amps and jamming out with my BARO sensor...

Ian

--- MonsieurBoo@aol.com wrote:

> > Anyway at sea level you should be seeing around
> 160-170 Hz.  As
> > you apply vacuum to the open port the frequency
> should decrease to  a
> > low of somewhere around 90Hz. The sensor has 3
> wires. One is the 5  VDC
> > supply, one is a ground and the middle pin on the
> sensor should be  the 
> changing
> > output. I do have instructions for using a
> tachometer to  read the 
> frequency.
> > Set it on 4 cylinder setting and you should see
> 4800  rpm with no vacuum and
> > the rpm's should decrease with increasing  vacuum.
>  
> Hmmm, with a 5V level, any electronic musicians out
> there could hook the  
> output to an op amp and drive a speaker with it.* 
> Then compare  it against some 
> instrument you have handy.
>  
> For example a keyboard.  150 Hz is roughly a D3 (D
> below middle  C) and 90 Hz 
> is roughly an F2 (2 Fs below middle C).
>  
> Or a guitar:  150 Hx is roughly the same as the open
> D (4th)  string.  90 Hz 
> is about the same as the low E (6th) string on the
> second  fret, which takes 
> it up to an F2.
>  
> If you don't have any suitable instruments, here's a
> link to a set of  guitar 
> tuning tones but you would have to use the open low
> E and it will be one  
> tone lower than the BARO sensor with vacuum applied:
>  
> _http://www.guitartips.addr.com/tuner.html_ 
> (http://www.guitartips.addr.com/tuner.html) 
>  
> These are moderately low frequencies so don't use
> too dinky a speaker  ;-)
>  
> Cheers
> Mark LaBarre
> 94 atx 130k
>  
>  
> *Or you could drop it down to max 1V and run it into
> a  line-level input to 
> your stereo, using appropriately-valued bridged
> resistors as  at:  
> _http://www.termpro.com/articles/faders.html_ 
> (http://www.termpro.com/articles/faders.html) 
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> 



		
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