speed sensor output

[max]

Works fine downunder Lord Popgun, just wondering why you say it is a minus voltage, it shows on the top part of the scale, have you inverted the scope or is the trace centered on 2 div from center?

Thanks for explaining how the probe is connected, makes all the difference when trying to work out what the result is.

So now we know it is a digital sensor as opposed to Zirconxi's coil/magnet one for his ignition.