Stamp to monitor engine speed.
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I have a engine off a rider mower that i would like to monitor the engine speed.
For input, there is a big magnet on the flywheel that i could count 1
pass/revolution. How do i get the magnet passing to feed into pulsin? Or if
there is a better way to monitor each revolution of the engine??
Im a newbie in electronics so partnumbers or basic schematics (nirvana), I would
be eternally gratefull.
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[noparse][[/noparse]Non-text portions of this message have been removed]
For input, there is a big magnet on the flywheel that i could count 1
pass/revolution. How do i get the magnet passing to feed into pulsin? Or if
there is a better way to monitor each revolution of the engine??
Im a newbie in electronics so partnumbers or basic schematics (nirvana), I would
be eternally gratefull.
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
[noparse][[/noparse]Non-text portions of this message have been removed]
Comments
>I have a engine off a rider mower that i would like to monitor the engine
speed. For input, there is a big magnet on the flywheel that i could count 1
pass/revolution. How do i get the magnet passing to feed into pulsin? Or if
there is a better way to monitor each revolution of the engine??
>
>Im a newbie in electronics so partnumbers or basic schematics (nirvana), I
would be eternally gratefull.
Either a reed switch or a Hall Effect sensor will do what you want.
Reed switches may also be known as proximity switches as they're used in burglar
alarm intrusion detection.
Regards,
Bruce Bates
detect the magnet, then a one-shot to clean-up the pulse. Feed this
into the Stamp and use the COUNT instruction to determine revolutions
for a given period, then do a bit of math to determine speed.
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: Mr. M [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=CI88ZXr0lrYgEcKNSyu1TTmKMEUxGeXFpT_kMMmQxlzXgjg2Dm6Ro-V-1cztBtkNaZ0JEdQIRWqCdltY9k7gXg]the_0utsider1@y...[/url
Sent: Wednesday, January 28, 2004 9:36 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Stamp to monitor engine speed.
I have a engine off a rider mower that i would like to monitor the
engine speed. For input, there is a big magnet on the flywheel that i
could count 1 pass/revolution. How do i get the magnet passing to feed
into pulsin? Or if there is a better way to monitor each revolution of
the engine??
Im a newbie in electronics so partnumbers or basic schematics (nirvana),
I would be eternally gratefull.
controlled by the motor rotation (every other revolution on 4 cycle engines,
every cycle on two cycle engines). Use this switch coupled to an optical
isolator and feed directly into the input pin on the stamp and you should
have a simple way of detecting engine speed. For a four stroke engine, just
multiply by two.
jim
http://www.geocities.com/jimforkin2003/
Original Message
From: Mr. M [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=jKqgrC7GS6a24Gyl_-hZ9uWbJLMNg8CuE9IOrv8RsvF1IfMc45PDfh5fwIKkhqWtxwTi2aYi4QrZtZMcfCs]the_0utsider1@y...[/url
Sent: Wednesday, January 28, 2004 10:36 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Stamp to monitor engine speed.
I have a engine off a rider mower that i would like to monitor the engine
speed. For input, there is a big magnet on the flywheel that i could count 1
pass/revolution. How do i get the magnet passing to feed into pulsin? Or if
there is a better way to monitor each revolution of the engine??
Im a newbie in electronics so partnumbers or basic schematics (nirvana), I
would be eternally gratefull.
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
[noparse][[/noparse]Non-text portions of this message have been removed]
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this to a Zener.
It will save you the trouble of pulling the flywheel.
Scope it to see how bad the spiking is and shunt the bad spiking with
0.1 or 0.01 ceramic caps to clean up the signal. Don't be afraid to use
more than one if necessary.
There will be a pulse for every revolution on small engines with
flywheel magnetos or crankshaft driven points.
"Mr. M" wrote:
>
> I have a engine off a rider mower that i would like to monitor the engine
speed. For input, there is a big magnet on the flywheel that i could count 1
pass/revolution. How do i get the magnet passing to feed into pulsin? Or if
there is a better way to monitor each revolution of the engine??
>
> Im a newbie in electronics so partnumbers or basic schematics (nirvana), I
would be eternally gratefull.
>
>
>
> Do you Yahoo!?
> Yahoo! SiteBuilder - Free web site building tool. Try it!
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and Body
of the message will be ignored.
>
>
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