Hi,
I'm pretty new to this, so maybe this is a simple question.
I'm wondering how I can get the output from the analogRead in volts. I have a gyroscope (IDG1215) with a sensitivity of 15 mV/°/s, bias of 1.35V and working on 5V. I know that the analogRead() function returns a value between 0 and 1023. But how do I get the voltage from that value?
Thx!
Each count represents 5 / 1023 volts. (unless you've set a different analogue reference)
Ok,
So the same with my accelerometer that is working on 3.3V:
Value(in V) = analogRead()*3.3/1023?
Only if you have 3.3V as your analogue reference.
No, I dont have analogue reference.
Yes, you do.
It is almost certainly 5V.
Ah! I get it now!
Thx for the help!
Look in the reference area and read the cautions on AREF.