Help with pressure sensor.

[erice1984]

yes, its an autometer 2242 pressure sender unit. its really annoying.

all I have is
15 ohms = 100psi
175 ohms = 10psi


What I am doing right now is using regulated current. ~5mA

[erice1984]

reason why I am not using the 8bit adc is because I would have to use a lot more current to get it up out of the 19mV range, and not really wanting to do that since it seems to vary more, its probably my hardware tho, LM317T current reg.

[mackrackit]

I think I see the problem.

The ADC is for measuing a voltage.

Use the sensor for R1 of a voltage divider and a fixed resistor for R2. The feed that output to the PIC.

http://en.wikipedia.org/wiki/Voltage_divider