[Diy_efi] Ignition "ringing"

Chris Ice cice at trub.com
Fri Apr 25 18:36:18 GMT 2003


From: "Tomas Sokorai Sch." <tsokorai at xperts.cl>
>
> pretty tricky. I've tried many different approaches for getting a nice squa=
> re=20
> 0-5V signal, but I got a very limited the success :(. I tried Dennis=20

Yikes. :o

> Noordsij's (from this list) recommended circuit=20
> (http://www.bubblesoftonline.com/projects/points.html), the one from the=20

This one is 404, sadly.  Is the author still around, or do you have an 
offline copy (ie. pdf or somesuch)?

> Megasquirt input (http://www.bgsoflex.com/megasquirt.html) and some=20

K.  Will have to do some digging here.

> variations over the idea of using the ne555 in monostable mode (like the ta=
> ch=20
> circuit in http://members.shaw.ca/tsmit/tachmod/tachmod.html).

Ok.

> The circuit that worked over the broader RPM range was the Megasquirt's, bu=
> t=20
> still was absolutely unusable for triggering my uC input to log RPM reliabl=
> ey=20
> (sp.?) over my engine's RPM range. You might be more successful as you use=
> =20
> other ignition (mine's a '75 Ford Duraspark I).=20

Spiffy!  Thanks for the info!

Chris
-- 
Chris Ice                    "Laugh'a while you can, Monkey Boy."
http://www.trub.com/                               - Dr. Lizardo



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