Arduino Forum

Products => Arduino Due => Topic started by: JChrispy58 on Mar 21, 2013, 07:39 pm

Title: Interfacing Hall-Effect current sensor with Due?
Post by: JChrispy58 on Mar 21, 2013, 07:39 pm

I am in the middle of my senior design project which is only a current measurement device capable of measuring current accurately from .5mA up to 20 A.  I decided to go with using several different sizes of hall-effect sensors and switching between them based on the incoming current.  I decided to go with using an Arduino Due because of the simplicity that the DAC pins give me.

Well, now that you know a little about my project, the issue I am having is that all of the current sensors output 5 volts analog and the Due can only read 3.3 volts.  I've found that the Aref pin is unable to used on the due.  I also don't feel like just using a voltage divider will give me the accuracy that I want.

My question there a quick and nerdy, yet accurate way to read these 5 volt analog signals with my Due.  If this is really easy to solve, just remember I'm still a student and unaware of a lot of the shelf technology that's out there.