05-10-2020, 08:41 AM
Dubs elaborating on LP's result i agree totally with his findings, but there may be another way to get your 0 to 5 volt signal out of the e.c.u.
If the speedo is using the e.c.u. for an input of it's speed indication it could be that the ecu has a 0 to 5 volt output.
That is when the rear wheel sensor drives the e.c.u. instead of the speedo itself like the early models apparently did, so have a think about that option.
Failing that i think there is a very simple way of converting the 10 volt sensor signal in a 0 to 5 volt one with a zener diode, two resistors and a small npn transistor, briefly you drop the 10 volts to a 0 to 1 volt signal by "loosing" 9 volts in the zener diode, feed that into a transistor and "collect" the output of that transistor to your input, careful selection of components would be required to not affect the rear wheel sensor's signal.
If the speedo is using the e.c.u. for an input of it's speed indication it could be that the ecu has a 0 to 5 volt output.
That is when the rear wheel sensor drives the e.c.u. instead of the speedo itself like the early models apparently did, so have a think about that option.
Failing that i think there is a very simple way of converting the 10 volt sensor signal in a 0 to 5 volt one with a zener diode, two resistors and a small npn transistor, briefly you drop the 10 volts to a 0 to 1 volt signal by "loosing" 9 volts in the zener diode, feed that into a transistor and "collect" the output of that transistor to your input, careful selection of components would be required to not affect the rear wheel sensor's signal.