My Omega 2/2+ dock\new
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I thought that people might be interested to hear that I just received my boards from OSHPark. Hopefully that means that everyone waiting for orders will get theirs any day now, as well.
So, now I need to pull together the components and then assemble them!
Mike
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@Allnight keep me updated, if you need any help!
@Douglas-Kryder how is it going with your board?
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@valerionew hi, as sometimes happens in my life, unexpected stuff happens that kills my "fun " time that i use for projects. so , looking to get started saturday on my board, i have all parts. thanks.
edit: saturday, got started on board and first time i looked at it up close wanted to ask about that what appears to be a near bridge between pins on micro ab-usb [D+,D-] power-in, is that something you wanted.
edit: sunday, i have read it may have something to do with a signial to the power supply about device needing just power. turns out the micro ab power-in receptacle you had selected has a different footprint than what i had so i ordered a correct one and will have it this friday to complete board.
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@valerionew i need some help on polarity on the pcb for C3, C4 , C5, F1, & D1. i don't see any markings on the board i'm familiar with. i never have been any good at getting placement info from schematic. thanks.
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@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)
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@valerionew said in 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)ok, just one double check. and this one i almost solder in place, but D1 has a small green dot [on my LED it has green marking on same side as cathode marking on underside] on side facing away from edge. does that green dot on LED have any significance ? thanks.
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@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
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@valerionew ok, thank you for the speedy reply and the info.
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@Douglas-Kryder said in My Omega 2/2+ dock\new:
@valerionew, i completed populating the board. the regulator is warm to touch however the power led does not light up. when i tried with omega2+ in headers there was also no power led on the omega2+. so, do you have any suggestion or tips on debugging what appears to be an issue with my power circuit? thanks.
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@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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@valerionew said in 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.
ok, i'll post some pictures when i get back home. the regulator does has voltage in of 5.1v & voltage out of 3.265v. i bought 5 of the regulators and all of them show ~3.265v out when hooked to my power supply and voltage in of 5v.. i wondered if that could be it, but ~.035 less voltage [~1%] should be enough i would think. i could not find an absolute min voltage needed to power anywhere. U1 also shows 3.2v. ok, thanks for reply.
edit: a friend took a look at it after lunch and said that the female headers on each side had issues with too much solder, did not surprise me since i have not done many 1.00mm pitch headers anyway he removed them but did not have any 1.00mm. so i have to place those. my friend also mentioned i should go back over the solder work. so i got some rework to do. looking forward to reading your comments valerionew.
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@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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@valerionew ok, thanks for looking. feel stupid about R5, should have never happened & should have noticed. the short you mention on usb i think was just a small metal tab coming off the top of the metal casing due to photo angle looked like a bridge. but after taking care of R5, power LED now lights up. I will do the headers tonight & report.
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@Douglas-Kryder
Check that you have 3.3v on the correct pins prior to inserting the omega in the dock!
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Is it available for purchase? Assembled / soldered one.
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@valerionew said in 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!yes. in my case it is ~3.265v. once i got headers in and checked, put an omega2+ in it powered up ok. i attached a 250GB hard disk to usb and it was recognized then i plugged in ethernet and ifconfig reports it available. at this point decided to take a break from it and will pick up tomorrow or Sunday afternoon. i need to review & read some more. but, thanks valerionew for creating the dock\new and your help as i built my first one. i appreciate it. doug
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@Sekar-Pdkt
Contact me via PM, i may have one or two assembled
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@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.
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@valerionew , yes, you are correct. prior to building a copy of your dock\new i had used a simple rj45 dongle thru usb on expansion dock. first tim i plugged it in i was surprised a bit that omega2+ had recognized it but i found that the action on that web page you link was necessary for the dongle so in building the dock\new i assumed it would be necessary but i was not positive. anyway, thank you for mentioning it.
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@valerionew Any update on the project?
