cleesgt
New Member
I'm trying to add a solid state sensor for pressure called 4040pc100 by honeywell. A datasheet is attached. The sensor has three wires: ground, +5v input, and signal/output. The output is 0.5v to 4.5v (40 mV/psi).
What I don't understand is why I need a pull-up resistor? If I do, what value resistor? Because only two pins on the DB37 don't use pull-ups, I'd like to use one of the many other pins that use pull-up resistors.
Any thoughts or advice?
Thanks
What I don't understand is why I need a pull-up resistor? If I do, what value resistor? Because only two pins on the DB37 don't use pull-ups, I'd like to use one of the many other pins that use pull-up resistors.
Any thoughts or advice?
Thanks