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Power Arduino Uno from 12V supply

flashdom

May 21, 2010
18
Joined
May 21, 2010
Messages
18
I am trying to power arduino mcu without 2 power supplies but I am not sure if arduino can handle 12V. I need the logic pins to accept 12V (or change the voltage somehow), this would be used for detecting dip switch positions. Anyone know if arduino can use 12V or would it damage it? Power supply is not well regulated (it's ~15V with no load).
 

flashdom

May 21, 2010
18
Joined
May 21, 2010
Messages
18
I was actually thinking about this in the wrong way, I looked at Atmega328P datasheet from the link and it made sense, I was thinking of using 12V for the logic directly when psu actually connects to vcc/gnd pins. Thanks.
 

flashdom

May 21, 2010
18
Joined
May 21, 2010
Messages
18
Actually that does not seem to be the case. As soon as the usb is diconnected from the device the programming logic stops too. I am assuming this is because microchip looses power... If anyobe have some experience with this please let me know...
 
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