By the way i checked the ethernet speed with iperf. Seems good to me. (94.4Mbit/s up and down, in case the image doesn't work)
I'm using a 0.1uF instead of 1uF capacitor to ground the center tap of the transformer, but i don't think that's significant. If you happen to have a 0.1uF 0805 capacitor instead of 1uF, don't bother buying a 1uF one.
valerionew
@valerionew
Best posts made by valerionew
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RE: My Omega 2/2+ dock\new
Latest posts made by valerionew
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RE: Omega PoE Dock
Really cool! This was a feature i was asked a lot for my dock\new, but i've never implemented it. I'll be more than happy to link this project.
Let us know how the project goesBTW i can't open the project in my kicad version. Are you on a nightly build?
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RE: My Omega 2/2+ dock\new
@Wojciech-Kapelinski The project is released on github, at the moment i'm not planning to do any new version
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RE: My Omega 2/2+ dock\new
@Douglas-Kryder
Today i've done a factory reset. To respond to your question about setup: you'll also need to follow this guide https://docs.onion.io/omega2-docs/using-ethernet-expansion.html#using-ethernet-expansion to set up internet access via ethernet. -
RE: How to really get to Omega2 on omega-ABCD.local (use .lan?)
.lan doesn't seem to work for me (unless i'm connected to the omega's own AP)
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RE: My Omega 2/2+ dock\new
@Sekar-Pdkt
Contact me via PM, i may have one or two assembled -
RE: My Omega 2/2+ dock\new
@Douglas-Kryder
Check that you have 3.3v on the correct pins prior to inserting the omega in the dock! -
RE: My Omega 2/2+ dock\new
@Douglas-Kryder Well.. the cause for the led not powering up i think that would be the fact that you have a capacitor instead of a resistor on R5.
But you said that neither the omega is powering on. I'd look for shorts and solder bridges on the board. E.g. on the microusb connecctor seems like that on the first two pins (from left to right in the picture you posted) there is a solder bridge. It will be easy to clean with a solder wick.
Did you tested the regulator in circuit?3.2 or 3.4 wouldn't make that much difference, don't worry.
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RE: My Omega 2/2+ dock\new
@Douglas-Kryder
Can you post some photos of the component side?
After plugging the usb you should measure the voltage on the regulator's pinsBTW don't insert the omega in the dock again before we resolve this power supply issue.
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RE: My Omega 2/2+ dock\new
@Douglas-Kryder Yes the green dot is the cathode, my mistake with the picture. I'll fix that in a moment (although it will need some time for the github's internal cache to reload).
Green dot should be facing the edge.
EDIT: doing some research, the dot can either indicate the anode or the cathode.
When in doubt, better test the led with a multimeter in the "diode test" mode.
Otherwise, referring to the datasheet seems a good idea, if you have a part number -
RE: My Omega 2/2+ dock\new
@Douglas-Kryder Sure.
C3, C4, C5 are ceramic capacitors. They are not polarized, so you can put them in either way.
F1 is a PTC, basically a resistor that changes it's resistance according to the temperature, and it is non-polarized too.
D1 is a LED, so it is polarized. Anode and cathode should be marked on your led. Some of the most common markings are shown here (https://goo.gl/images/WXHRK8). In the dock\new, the cathode (negative) side of the LED is facing towards the edge of the board (to the right in this picture)