Anyone pulled their power steering fuse?

[CrankyOldMan]

Originally Posted by CTScott

If you wanted to do it without a microcontroller, you could use a frequency to voltage converter IC and then feed that through a comparator.

I've located some potential parts for these, but I'm not sure how I'd go about measuring the pulse per mph. Do you by chance already know what it is?

I'm also guessing that the signal is 12V, so you'd have to use a regulator or voltage divider to get down to the 5V input that the F/V chip is expecting. I'm still looking through the datasheet to see exactly how the F/V converter works. Any suggestions on what kind of comparator would be the right type to use?