mung wrote:prakis wrote:Hi,
I am not sure if this is the right place to post this question, pls let me know if there is any other place.
Can RPi USB power Arduino ? That will avoid two power supply's, one for RPi and one for Arduino (atleast for simple projects which don't need much current).
Thank you
I would think it can in many different ways shapes and forms, but also may not work in many other circumstances, it all depends on what your exact requirements are.
I posted a link on another thread (I think something about 'avr atmega16' if you forum search those terms)showing youtube video of a 5volt chinese atmega mini clone being powered and programmed from the rpi gpio pins and running at 3.3v, this would be very bad idea for most applications as it could damage the rpi and I get the feeling brownouts were occuring on the atmega but it allowed programming without voltage levelshifting and seemed fairly reliable as I have not yet had any errors after 30 or more arduino programmings and the rpi still seems to work fine, ymmv.
Thanks for your answer, I edited my question to include my requirement which is ...
One of my requirement is to use a Arduino Motor Shield which has a separate power supply. I don't want to use 3 power supply's
1) Power supply for Raspberry PI
2) Power supply for Arduino
3) Power supply for Motor Shield or other shield.
Answer given: Yes you can power Arduino with Raspberry PI USB as long as it is not powering any power consuming Shields or Motors.