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Old 01-06-2017, 11:39 AM   #1
bobjonah
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Default Electronic Speedometer

a while back, there were discussions regarding electronic speedometers. Particularly a Smiths one made by" Caerbont, but I can't find the thread.
Has anybody purchased one? Does it work well ?
I am interested in getting one, and wonder if the VSS from my Suzuki speedo would provide the necessary pulse signal.

Hoping somebody might know
Bob Jonah
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Old 01-06-2017, 04:03 PM   #2
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Is this the one you are talking about?

https://www.digital-speedos.co.uk/ga...eedometer-p327

I'm looking at it as an option but swaying towards getting another ETB Digidash as it has the oil pressure, water temp integrated.
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Old 01-06-2017, 04:17 PM   #3
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I know the person who had one of the prototypes to test and was allowed to keep it, they have had it over a year with no problems as far as I know
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Old 01-06-2017, 04:36 PM   #4
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Yes, that is the one, but they are quite vague as to what sensor I need to fit.

My Suzuki speedo has a cable driven vehicle speed sensor ( VSS ) on the back of it. I am hoping that this would be suitable, but I have no way of determining this.

Am hoping that some of you tech wizard types can advise me one way or another
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Old 02-06-2017, 12:06 AM   #5
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Hey Bob,
Why don't you try speedhut?
I was told that you could send them your speedo and they would make one (either electric or gps) to match.
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Old 02-06-2017, 12:09 AM   #6
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I used them for my current mini build.
http://www.speedhut.com
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Old 05-06-2017, 01:12 PM   #7
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Hi Tamer:

Thanks for the suggestion - I am guessing that it would be expensive.
Caerbont is selling direct to me, as there is no local distribution in eastern canada, so I have a price that I can live with.
I am just trying to find out if my current VSS will provide the required pulse signal. Not getting much response, so I think I will add a hall effect sensor ( from Caerbont ) to my drive shaft and be done with it

Cheers
Bob
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Old 06-06-2017, 08:16 AM   #8
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i have one of these and it works ok, I'm using a gearbox sensor supplied by them after my first one died early. this is a series though.
do you know what the vss outputs?
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Old 06-06-2017, 09:44 AM   #9
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That's the thing, I don't know what the output is. It has only two wires - one to ground and the other to the CPU. I think it has a reed switch which opens and closes as the magnet rotates past it. It will deflect an ohm meter needle, but with no power source, I am not sure if it will create enough "pulse" to run the speedo. And, I am scared to run 12 volts thru it for fear of damaging the speedo, or burning up the VSS at stand still.

Thanks
Bob
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Old 06-06-2017, 01:54 PM   #10
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as long as it produces a pulse that should be enough, do you know for certain that the vss needs 12v or 5v? , I imagine a manufacturers standard type would be 12v. I'll have a look at the instruction that came with the speedo, see what it says.
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Old 06-06-2017, 02:39 PM   #11
bobjonah
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I just tried a 1.5 volt battery in series with the VSS, and it does not register any change when spinning it, so that tells me it will not be suitable. I will get a proper sender from Caerbont.

Thanks for your assistance
Bob Jonah
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Old 06-06-2017, 02:46 PM   #12
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According to the pamphlet that came with it, its suitable for either a 2 or 3 wire sender.
I used the 'drive to set' option and drove for a mile while it counted the pulses coming from the supplied vss. Did this twice and averaged out the number then saved that and checked the measured speed against a gps speedo app.
We did exactly the same on my brothers vtec using an ebay purchase honda vss and the dakota digital gauges in his car.
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