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using an arduino mini in combination with a MAG3110 Magnetometer

Posted: Sun May 20, 2018 5:58 pm
by IsaacSorrells
Hello, I am working on a tube-satellite project for my high school and I was wondering, how can I utlilize the Bi-Directional Logic Level Converter to convert logic between an arduino mini and a MAG3110 Magnetometer when the arduino mini does not supply a 3.3V port? In the diagrams of how to utilize the logic level converter an arduino uno is used and so the neccessary 5V and 3.3V pins are both provided by the uno but how would I do this with a mini?

Re: using an arduino mini in combination with a MAG3110 Magnetometer

Posted: Mon May 21, 2018 9:18 pm
by oesterle
You can create a voltage divider, using two resistors, to make a 3.3v source from the 5v on the Arduino mini. Check out the section on level shifting in this SparkFun tutorial on voltage dividers:

https://learn.sparkfun.com/tutorials/vo ... ll?print=1

By the way, precisely which Arduino mini model are you using?

Re: using an arduino mini in combination with a MAG3110 Magnetometer

Posted: Tue May 22, 2018 6:44 am
by n1ist
There are two issues - level shifting and supplying the power to the level shifter and magnetometer.
I would use a voltage regulator like the 1117 (like https://www.sparkfun.com/products/526 or https://www.sparkfun.com/products/8376) to convert the 5v to 3.3v.

/mike