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megasquirt and rev counter
graememk - 24/3/07 at 10:25 PM

wher would i put the signal wire from my etb rev counter ?

i'm running edis and megasquirt if anyone can help

graememk - 24/3/07 at 10:48 PM

lol bad smell, its curry that does it to me

anyway i did wonder if it would work like that, i'll drop a test wire in tomorrow

many thanks

TangoMan - 24/3/07 at 10:50 PM

I am using a transistor circuit out of the Megasquirt to give a signal with a 12v feed though a relay coil to give sufficient power. Without the 12v feed the tacho did not work.

There are various options in the manual depending on what type of tacho you have

graememk - 24/3/07 at 11:14 PM

will give it a go in the morning

MikeRJ - 31/3/07 at 08:52 PM

quote:
Originally posted by CaLviNx
Hi Graeme

You "should" be able to get a RPM signal from either side of the (-) off the coil you might need a diode to stop the rev counter "back feeding" any odd signal that might upset your spark signal from the edis unit.

Expect "MikeRJ" to be along soon, looking for an argument about it though........ seeing as he is my bad fart smell just now, that just seems to follow me everywhere, I must get the wife to cut cabbage out of my diet....


Perhaps your foul stench is indeed fading, took me a while to find this thread

I'm sure that you simply forgot to mention that by taking the RPM reading from one side of the coil pack that the tachometer will be reading 1/2 the RPM that the engine is actually doing (assuming it's configured for a 4 cylinder engine).

To derive a tachometer feed from a 4 cylinder coil pack usually requires a few diodes and a resistor to combine the signal from both of the coils.

Have a look at this thread but it would probably be simpler to use the MegaSquirt trigger output in this case.

les - 2/4/07 at 09:25 PM

Ok,

im having the same problems- trying to use an old porsche tacho,

its got terminals marked "+12", "1" and "-"

any ideas where to start? then ill try the wiring methods described in the other threads

thanks in advance as always!

MikeRJ - 4/4/07 at 03:32 PM

quote:
Originally posted by CaLviNx
Hi

As usual Mike you just proved me right, and showed everyone what a *ick you are, & that your slow on the up take.


And as usual Mark, the length of your highly polished brass neck never fails to amaze me.

quote:

And if you had actually taken time to READ the post fully, instead of jumping in with both feet thinking you had a juicy tit bit, either that or you conveniently "forgot" about the part of my post quoted below.

quote:
Originally posted by CaLviNx
does your ETB gauge allow you to multiply/divide the input signal ? as that would help if your getting an odd reading after connection.



Well, being a helpfull kind of chap I actualy took the time to check the ETB website, and noted the ones I could find could be configured for 4, 6 or 8 cylinders, so they can indeed multiply/divide the signal. Unfortunately this doesn't help the OP as it would have to be able to be configured for 2 cylinders to work of half a coil pack.

quote:

Funny also that you didn't reply to Ian/scoobylav in This thread (or did you "forget), after another vain attempt of yours at crap stirring as usual, time you crawled back under the rock you scuttled out of, if all you want to do is cause trouble instead of helping people, mind you usual double standards at work.


As is happens I haven't checked back there until recently, but Scoobylav was clearly unhappy with the way the thread was going and as I don't take enjoyment in annoying decent members of this forum I will leave it be.

On the other hand I noticed you didn't actualy clarify whether "your" ECU is essentialy a megasquirt with the injection bits removed.

Seems to me you love dishing it out, but but aren't so keen to be on the receiving side.


[Edited on 4/4/07 by MikeRJ]

MikeRJ - 5/4/07 at 04:17 PM

quote:
Originally posted by CaLviNx
Mike

what ever you say mike as your standards change more than your socks..... if you think your right and it makes you feel better then go for it............. i will just laugh at you as usual your not going upset me in the slightest....

[Edited on 4/4/07 by CaLviNx]


If I'm not upsetting you then why the constant digs at me in all your posts? Grow up.

Steve Lovelock - 6/4/07 at 07:58 AM

Back to the real problem if possible, Graeme, did you manage to get this working? If you did would you let me know what you did as I face the same situation.

Thanks

graememk - 13/6/07 at 09:13 PM

i used pin 11 from the edis