Sensing RPM on a small gas engine (Briggs&Stratton 8hp)
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Hello,
I am wondering if anyone has implemented a rpm sensor for a small
gasoline engine using a stamp? I am in search of a pulse for every
spark of the engine (which occurs every revolution) The engine uses
a standard magneto ignition. All help is greatly appreciated. I
haven't had any luck designing my own [noparse]:([/noparse].
Thanks,
J
I am wondering if anyone has implemented a rpm sensor for a small
gasoline engine using a stamp? I am in search of a pulse for every
spark of the engine (which occurs every revolution) The engine uses
a standard magneto ignition. All help is greatly appreciated. I
haven't had any luck designing my own [noparse]:([/noparse].
Thanks,
J
Comments
karts http://www.digatron.cc but they are very expensive. I know that that they
are using a pickup lead that clips to the sparkplug wire, but I have no idea
how this works. I think that once you determine how to pick up a signal the rest
would be easy. Or you could always use a hall effect sensor. Jameco sells a nice
inexpensive one. Sorry couldnt help more.
Thanks,
Jim Gorbet
jay_mann2000 <jay_mann2000@y...> Hello,
I am wondering if anyone has implemented a rpm sensor for a small
gasoline engine using a stamp? I am in search of a pulse for every
spark of the engine (which occurs every revolution) The engine uses
a standard magneto ignition. All help is greatly appreciated. I
haven't had any luck designing my own [noparse]:([/noparse].
Thanks,
J
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with one of it's ends tied to ground on the engine. When the plug
fires, it generates a small pulse of current, which must be amplified &
conditioned before being sent to the stamp. Pulsein might then be used
to obtain engine rpm. An amplifier might be as simple as a 4049 CMOS
inverter chip, or maybe a CMOS schmidt trigger, can't remember the
number of that.
HTH,
Leroy
Jim Gorbet wrote:
>
> I to am in interested in this. There is a company that sells them for racing
karts http://www.digatron.cc but they are very expensive. I know that that they
are using a pickup lead that clips to the sparkplug wire, but I have no idea
how this works. I think that once you determine how to pick up a signal the rest
would be easy. Or you could always use a hall effect sensor. Jameco sells a nice
inexpensive one. Sorry couldnt help more.
> Thanks,
> Jim Gorbet
> jay_mann2000 <jay_mann2000@y...> Hello,
>
> I am wondering if anyone has implemented a rpm sensor for a small
> gasoline engine using a stamp? I am in search of a pulse for every
> spark of the engine (which occurs every revolution) The engine uses
> a standard magneto ignition. All help is greatly appreciated. I
> haven't had any luck designing my own [noparse]:([/noparse].
>
> Thanks,
> J
>
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> [noparse][[/noparse]Non-text portions of this message have been removed]
>
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http://www.pcbcafe.com/BOOKS/SpiceHandBook/09_chapter08-08.php
Leroy Hall wrote:
>
> The pickup is a small coil of wire wrapped around the spark plug lead,
> with one of it's ends tied to ground on the engine. When the plug
> fires, it generates a small pulse of current, which must be amplified &
> conditioned before being sent to the stamp. Pulsein might then be used
> to obtain engine rpm. An amplifier might be as simple as a 4049 CMOS
> inverter chip, or maybe a CMOS schmidt trigger, can't remember the
> number of that.
>
> HTH,
>
> Leroy
>
> Jim Gorbet wrote:
> >
> > I to am in interested in this. There is a company that sells them for
racing karts http://www.digatron.cc but they are very expensive. I know that
that they are using a pickup lead that clips to the sparkplug wire, but I have
no idea how this works. I think that once you determine how to pick up a signal
the rest would be easy. Or you could always use a hall effect sensor. Jameco
sells a nice inexpensive one. Sorry couldnt help more.
> > Thanks,
> > Jim Gorbet
> > jay_mann2000 <jay_mann2000@y...> Hello,
> >
> > I am wondering if anyone has implemented a rpm sensor for a small
> > gasoline engine using a stamp? I am in search of a pulse for every
> > spark of the engine (which occurs every revolution) The engine uses
> > a standard magneto ignition. All help is greatly appreciated. I
> > haven't had any luck designing my own [noparse]:([/noparse].
> >
> > Thanks,
> > J
> >
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> >
> >
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> >
> > [noparse][[/noparse]Non-text portions of this message have been removed]
> >
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I have a schmidt trigger inverter. The problem I having is that I can not get
enough of a pulse to trigger it using a simple coil.. Any ideas as to gauge and
number of turns? etc?
Thanks,
J
Leroy Hall <leroy@f...> wrote: please see:
http://www.pcbcafe.com/BOOKS/SpiceHandBook/09_chapter08-08.php
Leroy Hall wrote:
>
> The pickup is a small coil of wire wrapped around the spark plug lead,
> with one of it's ends tied to ground on the engine. When the plug
> fires, it generates a small pulse of current, which must be amplified &
> conditioned before being sent to the stamp. Pulsein might then be used
> to obtain engine rpm. An amplifier might be as simple as a 4049 CMOS
> inverter chip, or maybe a CMOS schmidt trigger, can't remember the
> number of that.
>
> HTH,
>
> Leroy
>
> Jim Gorbet wrote:
> >
> > I to am in interested in this. There is a company that sells them for racing
karts http://www.digatron.cc but they are very expensive. I know that that they
are using a pickup lead that clips to the sparkplug wire, but I have no idea how
this works. I think that once you determine how to pick up a signal the rest
would be easy. Or you could always use a hall effect sensor. Jameco sells a nice
inexpensive one. Sorry couldnt help more.
> > Thanks,
> > Jim Gorbet
> > jay_mann2000 Hello,
> >
> > I am wondering if anyone has implemented a rpm sensor for a small
> > gasoline engine using a stamp? I am in search of a pulse for every
> > spark of the engine (which occurs every revolution) The engine uses
> > a standard magneto ignition. All help is greatly appreciated. I
> > haven't had any luck designing my own [noparse]:([/noparse].
> >
> > Thanks,
> > J
> >
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> > basicstamps-unsubscribe@yahoogroups.com
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Body of the message will be ignored.
> >
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> >
> >
> > Do You Yahoo!?
> > Yahoo! Tax Center - online filing with TurboTax
> >
> > [noparse][[/noparse]Non-text portions of this message have been removed]
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
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light)
or 40 turns #22 on a Toroid. Connect across the LED of a Schmidt(Darlington?)
Opto-coupler. Apparently the pulse generated is enough to light the LED( and
generate a pluse on the output side).
> Hello,
>
> I am wondering if anyone has implemented a rpm sensor for a small
> gasoline engine using a stamp? I am in search of a pulse for every
> spark of the engine (which occurs every revolution) The engine uses a
> standard magneto ignition. All help is greatly appreciated. I haven't
> had any luck designing my own [noparse]:([/noparse].
>
richard
Original Message
From: "Mike DeMetz" <miked@e...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, April 15, 2002 7:08 PM
Subject: [noparse][[/noparse]basicstamps] Re: Sensing RPM on a small gas engine
(Briggs&Stratton 8hp)
>
> Found something on the WEB last week. Use a clamp-on pickup(from a timing
> light)
> or 40 turns #22 on a Toroid. Connect across the LED of a
Schmidt(Darlington?)
> Opto-coupler. Apparently the pulse generated is enough to light the LED(
and
> generate a pluse on the output side).
>
> > Hello,
> >
> > I am wondering if anyone has implemented a rpm sensor for a small
> > gasoline engine using a stamp? I am in search of a pulse for every
> > spark of the engine (which occurs every revolution) The engine uses a
> > standard magneto ignition. All help is greatly appreciated. I haven't
> > had any luck designing my own [noparse]:([/noparse].
> >
>
>
>
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> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
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>
>
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>
>