Powering a Yun

Hi all

Question for you all regarding the powering of an Arduino Yun. As it is not like the Uno or Mega ADK in that is does not take a range of voltages and seems to be expecting a nice 5V usb supply, if I want to set one up as a standalone bit of kit can I supply power via 1.5V cells 3 x 1.5 = 4.5V? I see that I should be able to power using PoE but I was wondering if I could use it wifi only for some project ideas. I sort of think that 4.5V is not going to be good enough and I don't really want to stick 6V in as this is too much and the web page Arduino - ArduinoBoardYun seems to say that the 5V is the absolute limit. Does anyone have experience with battery powered Yun?

Cheers

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gadget.iom over 10 years ago +1

Something like this might work for you: 3A UBEC for Raspberry Pi - Dawn Robotics

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0 clem57 over 10 years ago

I did a little research @Mark Venn and can tell you the Linux side only needs 3.3V to operate. So not a problem here for a drop of .5V. The ATmega32u4 though would rather have a full 5 V. If you slow down the processor from 16 Mhz to only 8 Mhz, the requirement is cut in half to 3.0. This can be done carefully by changing the correct Fuse(soft programming) to use an internal oscillator at 8 Mhz. Be warned that incorrectly changing them can be fatal to the ATmega32u4 leaving you with no replacement since it is SMT mount and not DIP

Clem

The calibrated internal RC Oscillator by default provides a 8.0 MHz clock. This frequency is nominal value at 3V and 25°C. See datasheet.
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0 Robert Peter Oakes over 10 years ago in reply to clem57

You can change the 32U4 if needed, its just a little more tricky, I have an article on that very subject

See here: http://www.thebreadboard.ca/?cat=19

Sorry I don’t think I have this posted on the E14 site

So it is not always a disaster if the worst happens, just an opportunity to try something new

Peter
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0 clem57 over 10 years ago in reply to Robert Peter Oakes

@Peter Oakes,

Based on my recent experiences, this looks like brain surgery(LOL) by a kid(Me). BTW, I like your site!

Clem
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0 Robert Peter Oakes over 10 years ago in reply to clem57

The essential part is the hot air re-flow soldering Iron, eBay special for under 100$

solder paste helps too vs thin solder but that post was with regular solder as I had no paste at the time

Oh, and a magnifier, my eyes are not what they used to be
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0 Robert Peter Oakes over 10 years ago in reply to clem57

The essential part is the hot air re-flow soldering Iron, eBay special for under 100$

solder paste helps too vs thin solder but that post was with regular solder as I had no paste at the time

Oh, and a magnifier, my eyes are not what they used to be
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