Technical > Wiring & Sensors
Speed Sensor Genboard Hardware modification
Sprocket:
Do I go with this? http://195.159.109.134/vemsuk/forum/index.php/topic,717.msg7413.html#msg7413
Or with this? http://www.vems.hu/wiki/index.php?page=MembersPage%2FGergelyLezsak%2FAssemblyThreePointFive
I dont want to damage the processor. Its the only chip I haven't damaged yet :-\
SamSpade:
The conditioning circuit depends on what type and where you get the speed signal.
If the speed signal is from an ABS wheel sensor or the rear differential the circuits will be different. Also, in some cars the speed sensors go directly to the instrument cluster or ABS unit. They then send out a cleaner processed signal for use by the ECU, cruise control unit and other boxes. That would be the better option.
MWfire:
with first solution, you can't kill CPU with 20V or more.
But first solution works only if you speed sensor is open coletor or has 0ohm(short) impulses.
Sprocket:
Ah ok
I do not have any speed or wheel sensors, Its a Mini :D But I do intend to fit a hall type sensor using the aux 5v supply, sensor ground, and signal. What circuit do I need for this type of sensor?
Not sure where I am goung to install this sensor, But i was considering splicing it into the speedo cable some where, perhaps at the gearbox. I do intend to use a set of digital bike clocks in the not to distant future. I know there are other solutions for speed sensors, but Im looking for direct drive off the gearbox.
MWfire:
for hall use
http://195.159.109.134/vemsuk/forum/index.php/topic,717.msg7413.html#msg7413
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