Using 2.5V range in analog sensor

Using Arduino Sensors
#1

Hello guys,

I am geting only usefull 2.5v range from my analog sensor. Is it posible to map this range to have 1023 bits from it? Because now i have only haf of it, thats about 500 bits.

I am using differiantial presure sensor, which gives me range of -2kPa to 2kPa. And i need only the positive side.

Sorry for my English

#2

You could use the 3.3volt as analogue reference.

#3

I dont know if it would work, because i need to use the range between 2.5V to 5V. And 3.3 is not in it.

#4

because i need to use the range between 2.5V to 5V. And 3.3 is not in it.

Ah! Mission creep - this was not mentioned.
Shift your voltage so your sensor's 2.5v is ground, and negative voltages are clamped to ground.

#5

i wonder, if changing polarity wont couse any damage to my sensor? Its a MPXV7002DP

#6