How to get your Tach to work with modern ECU signals

[RomasDCW]

Russel - superb job! Now i can get away from these Speedhut gauges finally...
How much would you charge me if i sent you 3 tachos? I have bunch of 280z / 240z tachs laying around

 

[Sylv1]

Great info

Thanks for sharing

 

[Turn & Burn]

Well impressed, I can weld, but this electrickery is just mind boggling. I’ve got a spare tachometer, and may need one of these one day so I’ll send it down if still required by you?

PM me if u need one still (I’m guessing a 260 unit looks the same?)

 

[jonbills]

I read this again today. It’s thought provoking. Russell, if I acquired at 10k dial face, could this kit and the std coil be calibrated for it?

 

[Russell]

Russel - superb job! Now i can get away from these Speedhut gauges finally...
How much would you charge me if i sent you 3 tachos? I have bunch of 280z / 240z tachs laying around

Are you the same Roma’s I see making awesome carpets? If so, my 2+2 has no carpet so I’m sure we can come up with a deal

 

[Russell]

I read this again today. It’s thought provoking. Russell, if I acquired at 10k dial face, could this kit and the std coil be calibrated for it?

I don’t see why not as the sweep is Justin calibrated with resisters. I can experiment and come back to you.

 

[jonbills]

Great, thanks Russell. I’ll carry on researching how I can get a 10k dial face.

 

[Russell]

Great, thanks Russell. I’ll carry on researching how I can get a 10k dial face.

Looking at the original style 10k faces, the numbers are spaced differently as the rpm increases.
The only way i would be able to make it work is with equal spaces so you would have to look into getting one reproduced.

 

[Alphabettispaghetti]

Great, thanks Russell. I’ll carry on researching how I can get a 10k dial face.

If its a good copy I'll be in for one also.

 

[jonbills]

Much easier to reproduce it with equal spacing. I think I’ll have to make a vector graphics image and get it printed on some appropriate black plastic. I’ll get a bunch if I can do it.

 

[gorbys]

Hi, do you still have any more of those boards? I would be interested in buying one

 

[Didier BONNOT]

Hi, Russell
i'm making a similar board , but noticed a difference with your schematic and dinoplex diagram : you put a D4 parralel with D3 , not existing on dinoplex wiring ? there is a reason ?
regards
Didier

 

[Didier BONNOT]

sorry it's between D1 and D4 !

 

[Russell]

Hi, do you still have any more of those boards? I would be interested in buying one

Yeah I do, will likely order a load more as well.

Drop me a PM


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[Russell]

Hi, Russell

i'm making a similar board , but noticed a difference with your schematic and dinoplex diagram : you put a D4 parralel with D3 , not existing on dinoplex wiring ? there is a reason ?

regards

Didier

My circuit board is made from the eagle file so is exactly the same.

Not exactly sure what you mean?


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[Didier BONNOT]

http://www.dinoplex.org/tachoconversion/
Look at the schematic : only D1 , D4 is not there

 

[Russell]

http://www.dinoplex.org/tachoconversion/
Look at the schematic : only D1 , D4 is not there

Ah yes I see.
I think I just put another diode in there after looking at the picture of a completed board example on the page. It worked so I didn't question it.

If you download the eagle file, it includes it. Not something I have added.

I can test one without it and see what difference, if any it makes?

 

[Didier BONNOT]

Ah yes I see.
I think I just put another diode in there after looking at the picture of a completed board example on the page. It worked so I didn't question it.

If you download the eagle file, it includes it. Not something I have added.

I can test one without it and see what difference, if any it makes?

Yes, it would be kind of you to test, but what value is this diode ? she looks bigger than D1;
actually my board is not working, i certainly made mistakes but i can make a second , wait and see
thanks
Didier

 

[Russell]

Yes, it would be kind of you to test, but what value is this diode ? she looks bigger than D1;
actually my board is not working, i certainly made mistakes but i can make a second , wait and see
thanks
Didier

What are you trying to convert and what are you trying to do? I have a spare board and will likely order another batch when these run out. When you say yours is not working, is it not accurate or not working at all?

 

[datsunnyit]

[QUOTE = "Russell, post: 270611, member: 2022"] Cosa stai cercando di convertire e cosa stai cercando di fare? Ho una scheda di riserva e probabilmente ordinerò un altro lotto quando questi si esauriranno. Quando dici che il tuo non funziona, non è preciso o non funziona affatto? [/ QUOTE]
Ciao ho 260z tachi. Please can you give me the instruction ...how to test if work correctly or not? Where supply the voltage to test the tachi? And how many voltage for rpm 1000 or 2000 etc 8000 rpm. I connect a battery...