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Smiths Electronic Speedo Sensors


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#1 tmsmini

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Posted 10 June 2018 - 07:46 PM

There are a couple of sensors that can be used with the Smith's electronic speedos:

 

Digital Speedos

These are made by Koso

https://www.digital-...-wide-plug-p416

 

https://www.digital-...-thin-plug-p417

 

MiniSpares

I believe made by Daytona Global

http://www.minispare...cs/13H4443.aspx

 

http://www.minispare...cs/13H4443.aspx

 

The MiniSpares version comes with a wiring diagram, I got some handwritten notes from Digital Speedos which I would like to confirm

 

Anyone used either of these with success?

Terry


Edited by tmsmini, 16 June 2018 - 01:23 AM.


#2 kyle_1275

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Posted 10 June 2018 - 07:49 PM

Used the KOSO one myself, absolutely spot on; worked perfectly for the short duration I had the KOSO RX2+ in.

#3 tmsmini

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Posted 10 June 2018 - 08:27 PM

The MiniSpares version uses this:

Wire as per below:

Red Wire - +12volts switched live
Black/Green Wire - Ground/earth
White/Brown Wire - signal output

How did you wire yours? Did you use the 5 volt output from the speedo?



#4 kyle_1275

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Posted 10 June 2018 - 10:17 PM

Yes, 12v perm live to the clock which feeds back out to the 3pin connector for the sensor along with white/brown signal output and (in my case) flat black ground/earth.

#5 Moke Spider

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Posted 11 June 2018 - 02:06 AM

There seems to be 2 basic types of sensors for digital speedos, one type seems to be a simple coil and rotating magnet (2 wire), the other is a hall effect device (3 wire).

 

The first time I ran with one, I used the Dakota one that was on offer from one of the Instrument suppliers, it was a simple 2 wire thing, it worked ~OK~ above 10 kph, below that, it would seem it was simply spinning too slow to give enough output signal.

 

I then went over to a hall effect type similar to that on offer from Mini Spares. It works right down to less than 1 KPH, however I find after a days run, the following day, it won't work at all for the first few Km and while it was good when new, I'm now noticing the speedo needle gets a small shake in it, like an old work cable!! I've done just on 10 000 Km with this one.

 

There is another type I've seen which I must remember to grab one of to try, I've not been entirely happy with either of these.



#6 tmsmini

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Posted 11 June 2018 - 05:07 PM

Thanks for the updates. mine started to work at some point, so I will re-calibrate it today.

Digital Speedos did give me this:

 

To test the speed sensor with it connected and switched on put a meter on DC volts between the white wire of the sender and ground you should see 5 volts pulse when the sender is turned slowly.
 
The speed sensor should be connected to the following connections..
 
Red Wire to Pink wire of gauge
Black wire to ground
White wire to input signal wire 
 
except that on mine the wire colors are different on the sensor.


#7 tmsmini

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Posted 16 June 2018 - 01:27 AM

Just FYI...

It appears that now MiniSpares also sells the Koso version.

 

The earlier version I have uses a brass "box tube" to convert to the correct size for the output. The new ones seem to use a rubber or heat shrink covering.

The brass box tube needed to be filed gently to fit properly. I will test fit a new one at some point.

Terry






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