Pololu Robotics & Electronics
Menu
My account Comments or questions? About Pololu Contact Ordering information Distributors

Pololu Forum

ACS715 Current Sensor Carrier 0 to 30A Question


#1

Hello,

I am trying to change the output of three ACS715 Current Sensor Carriers (0 to 30A) and display their outputs on some cheap Mini DC 0-30V LED Panel Voltmeters. They work fine but the issue is the 0.5 VDC output at zero amps and the 0.133 VDC/amp output from the current sensors doesn’t lend itself to easily figuring out the actual current value. I have a table on paper to do the conversion to actual amps but that isn’t convenient.

I am hoping someone has designed a simple circut to make the conversion. I was thinking of some sort of Op-Amp circuit where I could dial in an offset to zero out the 0.500 VDC at zero amps and a “gain” control to adjust the output to something meaningful.
These current sensors are really only designed to measure current in one direction.

Any ideas would be greatly appreciated,
Thanks
Phil


#2

Hello, Phil.

An op-amp circuit like that seems like it should be possible. We do not have any specific suggestions for implementing that, but our other forum members might have some.

-Nathan