Onion Omega gets very warm
When working with my two Onion Omega devices, one of them gets too hot to touch. Is this a manufacturing variation or is there something wrong with my Onion?
My other Onion also gets quite warm, but it's not too hot to touch.
Hi @Austin-Hendrix, are you running the same thing on both of the Omega? Are they both using the same dock?
Yep! I'm running the same image on both, with the same settings.
I'm experimenting with the wifi settings, so I'm not running anything more than busybox and ping.
@Austin-Hendrix Do you hear any humming noise from the Omega?
Hi. My Onion is hot too. Does it have an internal temperature sensor?
@Vyacheslav-Bachynskyi No, AR9331 doesn't come with an internal temperature sensor. Which dock are you using the Omega on?
@Boken-Lin Mini Dock
@Vyacheslav-Bachynskyi That could be why. All the power circuits and the USB-to-serial chip is directly under the Omega, and adding to the heat produced by the Omega. The Expansion Dock won't get as hot.
However, the Omega should be able to handle quite a bit of heat without any issues.
Can anyone recommend attaching any kind of heat sink to the Omega? I've used both Mini Dock and Expansion Dock. I noticed the heat more on the Mini Dock, but both still create more heat that I expected.
Also, anyone can give tips on how to see what's causing the heat?
Thanks for the insight!
@Enrico-Bermudez You might be able to get one of these: http://www.amazon.com/LinuxFreak-brand-Aluminum-Heatsink-Raspberry/dp/B00A88DVTG. What kind of process are you running on the Omega?
I've ordered on Ali for $2.99 (8 pcs):
@Boken-Lin asked "What kind of process are you running on the Omega?" I just have the out of the box set-up and then created a pivot-overlay configuration to use a USB stick as part of the rootfs. Nothing else is running on it.
@Enrico-Bermudez The heat that you are feeling should be within normal range. We haven't had an issue with the Omega overheating yet. If you run some kind of a service on it does it get much worse?
I borrowed a temperature sensor and measured both of my Omegas. One is about 39C, and the other is at 54C. Is that within tolerance for the Omega?
@Austin-Hendrix Yeah, that should be within tolerance of the Omega. However, I'm not sure why there's such a huge disparity between the two Omega, especially since you are running the same thing on both. Does it change anything if you swap the docks that they are using?
Can you also take a closeup picture of the hot omega, both front and back side. I want to see if there's any visual signs of a defect that we can identify.
I tried swapping the docks on my Omegas (both expansion docks), and now the other Omega gets hot; so I think this is a problem with the dock.
It looks like the dock has a voltage regulator on it, so I measured the voltages on the expansion connector.
The 5V pin reads 4.7V
The 3.3V pin reads 4.6V
The 2.5V pin reads 2.8V
The 2V pin reads 3.5V
On my other dock, the voltages are all within 10% of the printed value.
FYI I just checked my dock
5v = 4.9v
3.3v = 3.34v
2.5v = 2.7v
2.0v = 2.17v
Austin, Lucky it does not seem to have zapped your Omega (yet)!
@Austin-Hendrix Wow! That sounds like a defective dock. I'm terribly sorry about that! We will send you a replacement. Can you confirm that your shipping address hasn't changed from what's on file?
@Boken-Lin : yeah, I haven't turned it on since I measured the voltages. I'm a little amazed that it kept working at those voltages, and doesn't seem damaged.
My shipping address is still the same. Do you want me to send the bad dock back for analysis?
@Boken-Lin I'm guessing I have the same problem as my omega runs very hot.
how do I measure these voltages?
Every post in thread is about the original Omega (Omega 1.)
There are plenty existing threads discussing Omega 2's (1) needing the proper power supply to Omega2, (2) overheating due to excess solder splatter, (3) overheating...