I want to make use of an alegro A1324LUA-T hall sensor to sense a very small magnetic field change would it be possible?

[johnerrington]

@assasinchop7

Alegro A1324LUA-T

Hi there. As its your first post please read this

How to get the best out of this forum

Welcome to the Arduino forum! A guide explaining how to get the best out of this forum is available at the link below. Please read it:

its polite to provide links to hardware so we know what you are talking about.

a1324-5-6-datasheet.pdf

@assasinchop7

Does anyone have any experience measuring such a small change in voltage on a rather large output signal as the sensor outputs 2.5 V when no field is present.

Yes that isnt a problem ; you can use an op amp to remove the 2.5V offset as explained here

Using Operational Amplifiers in your Arduino project

8: Example 2. Amplifying a signal from a sensor when it has an offset voltage Many common sensors will produce a voltage that does not "sit" on the 0V rail, as shown in the blue line in this example. [opamp signals3.png] The green signal is too small (say 0.04V) to measure with any accuracy; however by amplifying it by 100 we get a signal of around 0.04*100 = 4V that can be measured. However the signal on the blue line is small, but has a dc offset of about 2.5V; multipling that by 100 gives…