02GF74
|
| posted on 11/1/07 at 09:12 AM |
|
|
optical speed sensor
thnking of mking a small circuit using IR transmoitter/receiver diode to cont pulses on a slotted wheel driven by the speedo (ford 4 speed escort
exhast).
now when I took the speedo cable off, I notice that area has a bit of gearbox oil so wondering that this will be a problem for the optical sensors at
some point - unless it was just oil from the speedo cable.
anyone know if the speedo drives dribbles a drop or 2 from time to time to keep the cable lubed up?
|
|
|
|
|
MikeRJ
|
| posted on 11/1/07 at 10:04 AM |
|
|
I have noticed a few drops of oil tends to work it's way up the cable.
Why not use a hall sensor though? The speedometer will already have a rotating magnet so it makes things even simpler.
|
|
|
