Pull-Up configuration for multiple hall sensors

[edwardsjethro]

I possess three hall sensors requiring pull-ups for the crank and two cams. Can I utilize a single pull-up connected to +12V using, for example, a 1k resistor to supply all of them? Alternatively, should I opt for individual pull-ups for each sensor?

[jsmcortina]

You must use one resistor each.
Otherwise you would be shorting all of the tach signals together, which would stop them from working.

James