Triumphrat

mike-tt special

great to see that you got the light sensor idea working babushka

my turn to ask some questions baring in mind i know very little about electronics and i'm reluctant to disassemble my speedo.

if i taped a light sensor to the speedo glass above the LFL would light bleed from the speedo illumination light trigger the light sensor. and if so could i tune out the sensors sensitivty to back ground light with a different sensor or resistor.

RSDA

Just wondering how difficult it is to read the speed on the digital display. Seems awfully small. Thanks.

__________________
2012 Bonneville. Modifications.

mike-tt special

not to bad once you get used to reading a digital display (at a glance you see 40something,50something,60something not that different really to reading a dial)
also you can use the tacho to judge your speed at a glance i.e 4000rpm=60mph in 5th gear

Babushka

I am certainly not the electronics pro, but from all the experience i've been through with my sensor, I don't think it would work. Too many other lights. If you look at the pics I posted, I had to use the black heat shrink wrap tubing to further isolate the source of light. Damn thing was so sensitive, that even through white plastic, when the neighbor LEDs would go on, it would interfere.

As for resistors, I proved in practice that laws of physics and theoretical design had nothing to do with getting this project working. In fact everything that made sense on paper and calculator, proved to not work irl. I suspect my sensor was not specced correctly. Maybe if you can get your hands on a good sensor, you could get somewhere with regulating sensitivity.

My only advice is to take the speedo apart, if you decided to permanently remove it. It is not difficult at all, but be aware if you decide to reassemble it back, it probably not be the same cosmetically. I can help you with what I did, if you need.


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mike-tt special

this is my attempt at lateral thinking

after spending several nights staring at the interweb until very late o'clock because i don't really want to dismantle my speedo (if somebody comes up with a plug +play black box to replace the speedo i could sell the oe inst cluster later) i stumbled on this

http://laser.physics.sunysb.edu/~tanya/report2/

so my thinking is this. if i used a red led as a light detector above the orange LFL on the oe speedo and connected the red led to a voltage amplifying/switching circuit board i could power a fuel level led on the MG bracket.

if there is a very clever with electronics type person reading is this do'able, and if so how?

Babushka

Very interesting read, mike-tt!

So if you don't want to take the speedo apart, where are you planning to hide/place it? Assuming your idea will work, with the lowered sensitivity sensor and signal amplifier, you will make the assembly even bigger. I still think, unfortunately there is just too much other light to interfere with the sensor. But I do wish you luck and hope you can get something going. Please post the updates.


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MacBinary

We have a German software developer at work who worked at Bosch, and helped develop the canbus system (designed by bosch). I spoke to him yesterday and he would be keen to help reverse engineer the triumph system.
Just curious as to whether people are still interested in a work around for this as personally I won't be needing a ghost circuit for a while so don't want to waste his time.
If you've investigated this already please pm me any findings so I can expedite this project, and also what you want out of the system so I can define a scope for him.
Thanks

mike-tt special

praise the lord, ohh yesss!

hi macb judging by the amount of visitors to this thread(5000+) i think there is enough interest.

sorry macb i don't have any real technical info only what i and others have concluded through dabbling with it,
i believe the ecu and the chip in the speedo perform some kind of handshake(probably to prevent mileage tampering) also i think mileage,speed,low fuel light,malfunction indicator light,time are communicated on the canbus.

what i would like out of the system are the "handshake" also lfl (low fuel lght) and mil (malfunction indicator light) ideally using a plug in box that would perform the handshake and convert the digital signal for lfl and mil to 12v anologue.

hope this makes sense to you macb

anyone else have some useful info?

in the meantime i will still persevere with my led light sensor idea

mike-tt special

finally got a low fuel light working, its an adaptation of the way babushka did it, but without dismantling the speedo.
the light activated switch is a self assembly kit i bought from a local electrical store called maplins, the kit has a potentiometer to adjust the sensitivity.

the assembled kit looks like this

[IMG][/IMG]

i insulated the light detecting resistor (LDR) wires then bent it behind the circuit board so that it looks through a hole i drilled in the mounting box that will be directly above the oe low fuel light on the speedo when the box is in place

[IMG]
[IMG]

next i connected the wires to a 12v source (i used pin 7 on the tacho connector and pin 2 for earth) then holding the box in place over the LFL adjusted the sensitivity using the potentiometer (top right of first pic) so that the speedo illumination didn't trigger the sensor,
i connected the dash mounted lfl led to the circuit board led then taped the box in place on the speedo and then hid the speedo in whats left of my air filter box like this.

[IMG]
[IMG]

Babushka

Hey Mike-tt,
Glad it's working for you! As I was reading your post, I was wondering where your stored the whole thing. It's quite large in size. Are you planning to get rid of the stock air box ever? Would be hard to find a place for this solution.

Please post some pics of the bike with close up on the top headlight and controls.

Good job!!!!


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