Steve,

Thanks for the offer, but for simplicity I would rather connect the
tach directly without any external circuitry.  I'm pretty sure the guy
with the Prius was using a 5 volt signal to drive his tach so I just
need to find out what adjustment I need to make to get the one shot in
the tach to fire with a 5 volt input.

Bob W.

On Sat, 4 Oct 2008 08:39:28 -0400
"Steve Brooks" <cozy4pilot@gmail.com> wrote:

> Bob,
> There used to be a tach output, 12 pulses per revolution as I recall, but
> Tracy did away with it on one of the revisions.  I know this because I was
> using that to drive my automotive tach, and also a canopy lock warning if
> the RPMs exceeded 3500 RPM's and the canopy was not locked.
>
> I sent my EC-2 off for an upgrade, and when I got it back, the tach didn't
> work.  After talking to Tracy, he told me that he did away with it, because
> of some potential interaction with the controller and whatever that pin is
> hooked to.  He did tell me that I could use a pull up resistor and tat pin
> would still work, but to keep the resistance as high as possible.  Since I
> was using a cmos chip for my divider, I was able to put a 100K resister from
> the +12 volt to the input on my divider circuit.  It worked great, and I
> have not had any issues at all with that circuit.
>
> I actualy have The tach driver, Canopy lock warning, and a 5 minute fuel
> transfer timer and the circuit board.  All I have is my hand drawing of it,
> but if you want it, I could scan it and email it to you.  All of the parts
> are readily available.  I have it mounted in a small plastic case with a
> terminal strip on the outside.  It also has the warning beeper mounted to
> the box, and there is a relay in the box to switch on the tranfer fuel pump.
>
> Steve Brooks
>
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
> Behalf Of Bob White
> Sent: Thursday, October 02, 2008 4:40 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Coil trigger signal
>
>
> Tracy is on vacation for a while and I need to find out what the coil
> trigger pulse signal looks like.  Anyone know?
>
> This is in reference to recalibrating John Downing's tachometer.  I
> will publish what I've done as soon as I have it working.
>
> Bob W.
>
> --
> N93BD - Rotary Powered BD-4 - http://www.bob-white.com
> 3.8 Hours Total Time and holding
> Cables for your rotary installation - http://roblinstores.com/cables/
>
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> Homepage:  http://www.flyrotary.com/
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>
>
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--

N93BD - Rotary Powered BD-4 - http://www.bob-white.com
3.8 Hours Total Time and holding
Cables for your rotary installation - http://roblinstores.com/cables/

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html