Trail Tech Digital speedo and tachometre

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Trail Tech Digital speedo and tachometre

Postby Reno on Mon Feb 22, 2010 12:57 am

Hi guys

I have installed a all electronic vapour instrament cluster, I am struggling with the setting up of it. Does anyone know setings to get the Revs working? Please this would be a big help, I am running a 20v engine.


Thanks

Reno
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Re: Trail Tech Digital speedo and tachometre

Postby andredp on Mon Feb 22, 2010 8:31 am

Got one working this weekend incidentally, triggered RPM by the management system. What management system are you using on your 20V?
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Re: Trail Tech Digital speedo and tachometre

Postby Reno on Mon Feb 22, 2010 11:28 pm

I'm running a dictator
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Re: Trail Tech Digital speedo and tachometre

Postby andredp on Tue Feb 23, 2010 6:48 am

Ok, well then you may be able to use a spare output on the Dicktator to drive the Vapor. You will need to use a pullup resistor since I suspect the Dicktator will also earth outputs. You will also need to tell the management system to give a RPM based output on the specific output.
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Re: Trail Tech Digital speedo and tachometre

Postby Reno on Tue Feb 23, 2010 12:02 pm

Thanks I'll give it a go.... see what happens
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Re: Trail Tech Digital speedo and tachometre

Postby Reno on Sun Mar 07, 2010 1:16 pm

andredp wrote:Ok, well then you may be able to use a spare output on the Dicktator to drive the Vapor. You will need to use a pullup resistor since I suspect the Dicktator will also earth outputs. You will also need to tell the management system to give a RPM based output on the specific output.



Hi Andredp I have searched the whole of East London for a pullup resistor, and 90% of the people don't know what it is, secondly I need to know what ohms and watts is the resistor, and is there anywhere in Joburg that I could order on?

Thanks

Reno
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Re: Trail Tech Digital speedo and tachometre

Postby andredp on Sun Mar 07, 2010 6:14 pm

Hi Reno

A pull up resistor is just a plain resistor between positive and the signal wire. A 1K ohm resistor (of any wattage) should work 100% :)
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Re: Trail Tech Digital speedo and tachometre

Postby muller on Sun Mar 07, 2010 7:12 pm

andredp wrote:Hi Reno

A pull up resistor is just a plain resistor between positive and the signal wire. A 1K ohm resistor (of any wattage) should work 100% :)

you make it sound so simple :P
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Re: Trail Tech Digital speedo and tachometre

Postby andredp on Sun Mar 07, 2010 7:23 pm

muller wrote:
andredp wrote:Hi Reno

A pull up resistor is just a plain resistor between positive and the signal wire. A 1K ohm resistor (of any wattage) should work 100% :)

you make it sound so simple :P


It is 8)
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Re: Trail Tech Digital speedo and tachometre

Postby muller on Sun Mar 07, 2010 8:23 pm

andredp wrote:
muller wrote:
andredp wrote:Hi Reno

A pull up resistor is just a plain resistor between positive and the signal wire. A 1K ohm resistor (of any wattage) should work 100% :)

you make it sound so simple :P


It is 8)

Then why not just say wire in one those little stripy things between the positive and the signal wires??? Then we'd all know what you mean. :wink:
Anton

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Re: Trail Tech Digital speedo and tachometre

Postby andredp on Sun Mar 07, 2010 8:59 pm

muller wrote:
andredp wrote:
muller wrote:you make it sound so simple :P


It is 8)

Then why not just say wire in one those little stripy things between the positive and the signal wires??? Then we'd all know what you mean. :wink:


Ah well now I know the correct term I'll use it in future then :lol: One 1K little stripy thingy is needed then :D
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Re: Trail Tech Digital speedo and tachometre

Postby Reno on Sun Mar 07, 2010 11:19 pm

Ok I'll try and find a 1K little stripy thingy...LOL, in the mean time I hooked a auto gauge rev counter, and I connected it to the negative part of the distributor and it would only show the idle revs(aroubd 1000rpm) . When you Rev it, it moves really slow and nothing higher than 2500rpm. I have tried connecting it directly to the dicktator, but it gives me the same response. And at the back of the rev counter I set the button to 4 cylinder engine, and still nothing. any Ideas?

Thanks


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Re: Trail Tech Digital speedo and tachometre

Postby muller on Mon Mar 08, 2010 7:04 am

Reno wrote:the negative part of the distributor

Distributor? Not sure if its a typo, it should be connected to the - side of your coil
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Re: Trail Tech Digital speedo and tachometre

Postby Ben on Mon Mar 08, 2010 10:19 am

Wikipedia has a pretty good explanation for pull-up/pull-down resistors: http://en.wikipedia.org/wiki/Pull-up_resistor.

Quote:
"Such a resistor weakly "pulls" the voltage of the non-voltage-source wire it is connected to towards its voltage source level (high such as 5V in the case of a pull-up resistor, or low such as 0V in the case of the pull-down resistor) when the other components on the line are inactive. This is because when all other terminating connections on the line are inactive, they are high-impedance and act like they are disconnected. Since the other components act as though they are disconnected, the circuit acts as though it is disconnected, and no current will flow on the line, and the voltage of the non-voltage-source wire (common between the other components on the line) will be that of the voltage source (again either high or low) following the rules of Ohm's law."

Although that doesn't tell you that it is a 1K little stripy thingy, which is a clear omission on the part of Wikipedia. I shall be emailing their management.
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Re: Trail Tech Digital speedo and tachometre

Postby andredp on Mon Mar 08, 2010 10:38 am

:lol: I love this forum. Ben maybe you should let Wiki know that they need to review their terminology in total. I mean, "logic circuit", sheesh, more like black block thingy working with smoke I would think ;)
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