Hey there!
I have two boards with independent power supplies - a microcontroller dev board and a sensor board I'm designing just now. The microcontroller is to read the sensors output.
Now, I'm not sure about the two power supplies. Should the sensor board provide the reference voltages, or can I be sure that GND is on the "same" potential?
It'd be alright if the difference is a few millivolts, anything larger than that could mean though that the microcontrollers ADC might have to handle voltages larger than its VCC. That might just damage the microcontroller...no?
Does anyone have any experiences with this?
Thanks alot in advance!
I have two boards with independent power supplies - a microcontroller dev board and a sensor board I'm designing just now. The microcontroller is to read the sensors output.
Now, I'm not sure about the two power supplies. Should the sensor board provide the reference voltages, or can I be sure that GND is on the "same" potential?
It'd be alright if the difference is a few millivolts, anything larger than that could mean though that the microcontrollers ADC might have to handle voltages larger than its VCC. That might just damage the microcontroller...no?
Does anyone have any experiences with this?
Thanks alot in advance!