Tech4all group blog

Re: [tech4all] need help on cam and crank sensors

I take it he wants to measure the rotation of the cam/or crank. This
could be done with an Opto-Interrupter and wheel - basically the
innards of a mouse. Depending on the application - you may get away
with gutting a mouse, keeping the board and sensors and just plugging
it into a USB port while running the right app.

If you are using a PIC then some of them come with ports than can be
programmed to act on interrupts and use those to increment a counter.
The Opto-Isolator,generally one IR emitter and one receiving
Photo-transistor, may need to then be connected to a transistor to
bias it, or simply have a pull up/pull down resistor attached
(depending on if you want to trigger on leading or trailing edges).
This transistor assembly can then be plugged into the digital pin, and
to read it, you just read the delta (difference) of the counter.

Cheers,
Danny
--
http://orionrobots.co.uk - Build Robots

Online Castle Building RPG -
http://www.darkthrone.com/recruit.dt?uid=V30311Q30294A30328K30226H30311D30345

On 5/10/05, Abinanthan.B <abinanthan.b@thinksoftglobal.com> wrote:
>
>
>
> What sensor you are talking about? Write more about it.
>
>
>
> ________________________________
>
>
> From: tech4all@yahoogroups.com [mailto:tech4all@yahoogroups.com] On Behalf
> Of saranathan archana
> Sent: 09 May 2005 18:21
> To: tech4all@yahoogroups.com
> Subject: [tech4all] need help on cam and crank sensors
>
>
>
>
> hi all,
>
>
> where can sufficient information regarding cam and crank position sensors be
> obtained?can anyone help me regarding this?
>
>
> -archana
>
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posted by Bharath @ 3:52 AM