Hey guys,
Ive been messing with the arduino for a while now, but for some reason I only recently needed to run it off of 5 volts. Unfortunately, it looks like the Vin is connected to the voltage regulator, in which case 5v is too low to run it. Just wondering if anyone else has experience running an Arduino with 5v? And how you went about doing it?
Running Arduino off 5 volts
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Please be positive and constructive with your questions and comments.
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Re: Running Arduino off 5 volts
you can connect 5V directly into the pin marked 5V
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Re: Running Arduino off 5 volts
Awesome. Thanks!!
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Re: Running Arduino off 5 volts
hey thats handy! I have been using that for 5v out, I didnt even think about using it for power in... I was looking at minty boost, wondering if I would need a small boost regulator circuit to power from 5v. I saw conflicting info about using 12v for power, one place I looked said yes, one said no. 12v in would be handy for integrating an atmega into some exhisting circuits I have. Any definitive word on that?
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Re: Running Arduino off 5 volts
The 7805 will handle 12v, but you almost definately want to heatsink it if you give it 12v, and also be careful even then not to draw too much current.jolyrojr wrote:hey thats handy! I have been using that for 5v out, I didnt even think about using it for power in... I was looking at minty boost, wondering if I would need a small boost regulator circuit to power from 5v. I saw conflicting info about using 12v for power, one place I looked said yes, one said no. 12v in would be handy for integrating an atmega into some exhisting circuits I have. Any definitive word on that?
For a given 5v current consumption, using 12v nearly doubles the power dissipation of the regulator. (x milliamps * 7 volts instead of x * 4).
I remember once seeing a design for a switching regulator that fit in the board footprint of a 7805, however i was significantly taller. Ah, I found it -
http://www.instructables.com/id/Switchm ... regulator/
There's a commercial variant from Dimension Engineering.
Please be positive and constructive with your questions and comments.