I have an older Arduino Deucilmila connected to a Spark-fun razor accel/gyro that operates on 3.3v
In order to get the correct resolution of this device, I read somewhere that if I connect the 3.3v supply on the arduino to the Aref pin and set the Analog Reference to External in the setup function of my code, that the scaling factor for this device will be correct.
The problem is that when i connect the 3.3v pin to the Aref pin, the USB is no longer recognized by my PC.
I get the impression that this is not the correct configuration for this...
Can anyone suggest the correct way of setting the analog inputs on the older Arduino Deucilmila to accommodate the 3.3v range of the Spark-fun Razor?