MC1/HC1/HC2 PCB design file?

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rh4n
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MC1/HC1/HC2 PCB design file?

Post by rh4n »

I have some HC2s and want to do some hardware modifications to enable hardware power control (on/off/reset) from a separate system. Are the PCB designs available anywhere so that I can figure out which component pads on the PCB correspond to which wires in the schematic?

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Re: MC1/HC1/HC2 PCB design file?

Post by mad_ady »

It should be somewhere around here: https://wiki.odroid.com/odroid-xu4/hardware/hardware

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Re: MC1/HC1/HC2 PCB design file?

Post by odroid »

You can find HC2/HC1 schematics and mechanical drawings in this link.
https://dn.odroid.com/5422/ODROID-HC1_MC1/
But, we've not disclosed any ODROID PCB design files.

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Re: MC1/HC1/HC2 PCB design file?

Post by mctom »

I had a similar problem when I attempted fixes on HC2. There are no component designators on PCB and it's hard to tell which is which.
However I remember I used Odroid XU4 board for that. The component layout around SoC is almost the same (probably copied), and the components are designated.
But most of these components are decoupling capacitors, so you'll be very lucky to find an exposed reset signal somewhere. Well, it may have a pullup resistor, maybe.

However the DC input protection chip should have UVLO with a resistive voltage divider, you should be able to tap in there and pull that pin low to cut off the power supply.
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Re: MC1/HC1/HC2 PCB design file?

Post by rh4n »

odroid wrote:
Tue May 10, 2022 2:55 pm
You can find HC2/HC1 schematics and mechanical drawings in this link.
https://dn.odroid.com/5422/ODROID-HC1_MC1/
But, we've not disclosed any ODROID PCB design files.
Thanks for the link! The .dxf file is close to what I want, but unfortunately doesn't have the copper traces. Any chance you'd be willing to share the PCB design files?
mctom wrote:
Tue May 10, 2022 4:23 pm
I had a similar problem when I attempted fixes on HC2. There are no component designators on PCB and it's hard to tell which is which.
However I remember I used Odroid XU4 board for that. The component layout around SoC is almost the same (probably copied), and the components are designated.
Oooh, good idea! I'll squint at the XU4 for a while and see if I can figure something out. Thanks!

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Re: MC1/HC1/HC2 PCB design file?

Post by mctom »

Oh, you mention that you have HC2, and these have a built-in buck converter. That should be easy to disable it with EN pin as well.

For a reset signal, I remember C2 had a SOT23 component for generating power on reset and I used that for resetting the board with tweezers, hee hee.

Anyway I wouldn't count on HK ever releasing so detailed design files, that would be too easy to forge the PCBs. Actually I'm glad I don't have to deal with fake Odroids.
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Re: MC1/HC1/HC2 PCB design file?

Post by odroid »

rh4n wrote:
Tue May 10, 2022 5:19 pm
odroid wrote:
Tue May 10, 2022 2:55 pm
You can find HC2/HC1 schematics and mechanical drawings in this link.
https://dn.odroid.com/5422/ODROID-HC1_MC1/
But, we've not disclosed any ODROID PCB design files.
Thanks for the link! The .dxf file is close to what I want, but unfortunately doesn't have the copper traces. Any chance you'd be willing to share the PCB design files?
No. We will share another PDF file which shows the component reference numbers for your easier signal tracing.
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mctom (Tue May 10, 2022 7:28 pm)

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Re: MC1/HC1/HC2 PCB design file?

Post by ruppi »

Please refer to the drawing below with the Desgenerator.
HC2_Designator.pdf
(3.86 MiB) Downloaded 15 times
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rh4n (Wed May 11, 2022 2:50 pm)

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Re: MC1/HC1/HC2 PCB design file?

Post by rh4n »

Awesome, thank you so much!

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Re: MC1/HC1/HC2 PCB design file?

Post by mctom »

How awesome is that! Thanks, with this new input I'll give that HC2 another try someday.
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Re: MC1/HC1/HC2 PCB design file?

Post by rh4n »

Any chance you have a PDF for the rev 0.1 20171017 design? It looks like the 12V->5V buck converter changed between the 20170630 and 20171017 revisions.

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Re: MC1/HC1/HC2 PCB design file?

Post by mctom »

My understanding is the two revisions you're referring to are actually boards for HC1 and HC2. Buck converter has been introduced, in the previous design there was a input protection device instead.

But it's placed at the same spot anyway.
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Re: MC1/HC1/HC2 PCB design file?

Post by odroid »

HC2 has a slightly different power circuitry for 12V power rails.
Our hardware guy Ruppi is extremely busy these days. Give him a couple of days.
Yesterday, he spent a few hours to make the drawings of component reference numbers manually.

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Re: MC1/HC1/HC2 PCB design file?

Post by mctom »

I wouldn't dare to ask Ruppi to redo this work again just to cover such minor differences between these two boards. I think this file is very useful as it is.
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Re: MC1/HC1/HC2 PCB design file?

Post by ruppi »

I was mistaken because it was a model that I designed very long time ago.
I am re-attaching it for HC2.
HC2_MAIN_REV0.1_20171017.pdf
(3.92 MiB) Downloaded 5 times
rh4n wrote:
Wed May 11, 2022 6:04 am
Any chance you have a PDF for the rev 0.1 20171017 design? It looks like the 12V->5V buck converter changed between the 20170630 and 20171017 revisions.
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