Here's a very basic question, I prefer to ask instead of causing a possible damage to my Arduino.
Can I feed two devices to the 3.3V pin? for example, a accelerometer and a bluetooth module? each one takes 3.3V.
It does not matter how many device you connect, as they don't take more than 50 mA.
DC Current for 3.3V Pin: 50 mA
Is that true for the Uno? The onboard regulator is only good for that little current?
Its datasheet would suggest its good for 150mA, and it only connects to the power connector header.
I look at this source :
The same time SFE doesn't have this specific.
Could be mistake, or current limited based on maximum input 12V, as 3.3 getting input from 5V regulator, which in turn would have overheating problem.
With USB as power source 150 mA than.
The 5V could be from offboard, from USB, from the 5V regulator. 150mA would seem available if source can provide it.
I'd say 150 mA in most cases, except when arduino powered by 7 - 12V
Thank for you the feedback, fortunately, both devices use less than 50mA so I'm safe.