AVR-Chat

Talk about having the answer in the palm of your hand. I think the 
mouse could give enough accuracy. I wanted to play around with an 
accelerometer so I guess I was trying to make the problem fit the 
solution. The project is to make a digital display for a rotary table 
for my milling machine. For those not familier a rotary table sits on 
the milling machine or lathe and allows you to cut at points around a 
centre, cutting gears for example.

There have been lots of interesting answers on this thread many 
thanks and if there any other novel ideas I would love to hear them. 
Rich

--- In AVR-Chat@yahoogroups.com, "Rick" <eprom999@...> wrote:
>
> --- In AVR-Chat@yahoogroups.com, "David VanHorn" <microbrix@> wrote:
> >
> >  the capactive sensors that they use in digital calipers look 
pretty
> good.
> >
> 
> Yes good suggestion.
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Consider this-
> Take apart a computer serial ball mouse. In there you will see two
> optical breaker wheels, one for the X axia and the other Y.  If your
> mouse has a scroll wheel, you'll have a similar thing there.  It
> wouldn't take much imagination to adapt those parts to a Do It
> Yourself inclinometer.  The way these work is the mechanical wheel 
is
> spun and "chops" a beam of invisible infra-red light striking a
> photo-transistor.  It does so in a fashion which allow detection
> circuitry to determine which direction the wheel is spinning too. 
> Cannibalize a mouse for these components and build your inclinometer
> from that.
> 
> If you are designing a product to market as an inclinometer look at
> these sensors:
> 
> http://www.spectronsensors.com/tilt.html
> 
> They are capacitive.
> 
> M5
>