5V source to an AR input ?
Posted: Wed May 15, 2013 9:48 pm
This article describes the function and compatibility of the four different input types:
http://www.syvecs.co.uk/forum/viewtopic ... 7409e816d9
Accordingly a AR input with a permanent pullup resistor should'nt be combined with a sensor having much less than 3k resistance, because of overpowering the pullup.
On the other hand a usage for 0 - 5 V input signals should be ok. But 0V means the same load to the pullup as if the input was shortened to ground by zero ohms resistance.
I'm tight in inputs and have to use AR3 = AN15 for a fuel pressure sensor that delivers 0 to 5 volts (stainless pressure sensor from JTI).
Does that work without a need to be worried about the pullup ?
http://www.syvecs.co.uk/forum/viewtopic ... 7409e816d9
Accordingly a AR input with a permanent pullup resistor should'nt be combined with a sensor having much less than 3k resistance, because of overpowering the pullup.
On the other hand a usage for 0 - 5 V input signals should be ok. But 0V means the same load to the pullup as if the input was shortened to ground by zero ohms resistance.
I'm tight in inputs and have to use AR3 = AN15 for a fuel pressure sensor that delivers 0 to 5 volts (stainless pressure sensor from JTI).
Does that work without a need to be worried about the pullup ?
