Omega 2/2+ Without Any Dock
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Hello,
I just received my Omega 2s and 2+. But I didn't order any dock. When I look at the getting started section of the documentation area all the steps starts with a dock. Is it not possible to work with the board without a dock? Did I pay for nothing and realized just now?
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Hi,
You could start with powering the omega : https://docs.onion.io/omega2-docs/hardware-prep-no-dock.html
But I don't know how to connect to serial without board...
Good luck!
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Well that helps.
I will give it a try. But I currently have LM317. Is it possible to use LM317 instead of LD1117?
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@Gökhan-Türkeli Of course it is, it's just a linear voltage-regulator from a different manufacturer. It's not a fixed-voltage one, though, so you'll need a couple of extra components to set the output-voltage you want -- see e.g. http://www.reuk.co.uk/wordpress/electric-circuit/lm317-voltage-calculator/
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Thank you @WereCatf
I have some questions though.
- How should I connect the LM317 schematic with the one showed here? By looking LM317 schematic I see that R1 side will be Vout, R2 side will be ADJ. What about Vin? Will stay the same?(sorry if the question is too noob)
- It says "Connect your DC power supply to the barrel jack". What kind of DC ps should I use? What if I don't have barrel jack, is there any other way to give power to the board?
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Well, that's a good way of wasting couple of dollars then:)
I am not planning to buy any dock. If someone wants 2 Omega 2s and 1 Omega 2+ contact me. I will give it for free.
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@Gökhan-Türkeli Well, I would like them. It'd help me help others here. But why do you want to give them away, didn't you get them working? I would rather help you get them working.
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@WereCatf It seems I won't be able to make the board work without a dock. And if I have to buy a dock I feel like I am deceived. $5 for the actual cost and $15 for a dock? Really?
Here my fault might be not examining the documentation before placing any pledge. I thought it would be like powering an Arduino with pins but it looks it is not. I am not an electronic professional so it becomes complicated for me(at least I cannot move on without help) when I have to figure out schematics that I know nothing about them.
I don't know if it is still possible to use the board. With lm317 I have no luck. I will order a ld1117 and wait for a month then.
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@Gökhan-Türkeli You could just search for e.g. "usb step down 3.3v" on eBay and buy something like http://www.ebay.com/itm/3-in-1-DC-DC-USB-5V-to-3-3V-Step-Down-Buck-Module-LED-Motor-CPLD-ARM-AVR-Arduino-/231360476318 as a temporary solution. You really should teach yourself how to use voltage-regulators eventually, though.
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@WereCatf I have something like this: https://www.aliexpress.com/item/MT3608-2A-Max-DC-DC-Step-Up-Power-Module-Booster-Power-Module-For-Arduino/32611355118.html?spm=2114.13010608.0.0.Woa1Nc I don't know if it functions the same.
But your suggestion looks nicer since it has usb. I will try to find it on Aliexpress. Paypal is not available in Turkey, I cannot buy anything from eBay.
Thank you!
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@Gökhan-Türkeli https://www.aliexpress.com/item/2pcs-lots-DC-DC-4-5-7V-to-3-3V-USB-Interface-Multifunction-Voltage-converter/32287592421.html are the same as what I linked to, or e.g. https://www.aliexpress.com/item/9V-12V-19V-To-3-3V-DC-DC-Step-down-Power-Supply-Module-USB-Voltage-Converter/32704615873.html would also be perfectly fine.
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@Gökhan-Türkeli I'm just curious, what kind of issues did you have with LM317? I use LM317 to power up my Omega2, actually in same manner as I have powered up my arduino projects. One just need proper resistors to get 3.3v using LM317. The problem I had, was the smaller pin layout, that does not fit breadboard used in Arduino projects.
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@Gökhan-Türkeli you are right about the crazy dock prices $15!!!!! Slick marketing to offer a $5 computer when IMHO for most people it is upwards of $20.
A well known British charity sells computers that are probably better suited for you.
If you search this site you will see that several Omega users have designed their own docks. At the moment I think most are only PCB's but you can get 4 PCB's for less than $9 delivered. Components are cheap enough if you are handy with a soldering iron. Hopefully basic doscks will become available for 99 cents from the Far East in time.
Post edited as requested by @fossette
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@Costas-Costas It's only your point of view. You can't say MOST PEOPLE here as you haven't counted them one-by-one personally.
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@fossette do you think $15 is a reasonable price for the bare minimum dock?
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@Costas-Costas said in Omega 2/2+ Without Any Dock:
@fossette do you think $15 is a reasonable price for the bare minimum dock?
That's irrelevant! There are lots of hardware offerings out there. You have to choose a product with your best judgment. Some people are even doing a dock on their own, just because they can.
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@fossette just canvassing your opinion. As requested I have edited my post.
Anyone want to buy a new laptop for $200 and the case for the laptop is a snip at just $600
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@WereCatf thank you for suggestions. I will examine more.
@Joni-Korhonen I didn't even try with LM317 since I am not sure how to use it. If you have any suggestions(maybe schematics) I'd like to use it.
@Costas-Costas I totally agree with you. I find it expensive. Maybe not others but I do. It would be nicer to build my own dock if possible. Do you have any suggestion you liked?
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Not tried any of the PCB's but you might want to take a look at:
https://community.onion.io/topic/1338/new-omega2-basic-shield-power-ftdi-i2c-and-spi
and
https://community.onion.io/topic/1094/diy-onion-mini-dock
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@Costas-Costas looks really nice. I am trying to find out how to understand the pieces on the shield.
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@Gökhan-Türkeli OK, I can put an example of my setup, if needed (when back at home). I used this calculator to calculate correct resistor values.
l317calc That link also shows the pins of 317. to vin you connect + from your power source and ground is common.Actually here seems to be an example, which is almost like mine (I have omitted the capcitors on output, but it can be good to have there also):Example
