Author Topic: SD2SNES (last revision of the board)  (Read 29491 times)

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Offline ikari_01

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Re: SD2SNES (last revision of the board)
« Reply #15 on: June 23, 2014, 11:17 AM »
What ZeroWing says.

Rev.E1: the version made by KRIKzz up to now.
Rev.E2: actually older than Rev.E1 - I made E2 because the voltage regulator I used became unavailable to me, so I replaced it with parts. KRIKzz can still source the original regulator so this change was irrelevant to him.
Rev.F: A very recent revision. I just sent the CAD data to KRIKzz. This revision accounts for issues that some people with "1CHIP" consoles have been facing. There was an RF-like interference pattern to be seen on screen in some occasions. It is based on Rev.E1.

Feature-wise all revisions are still identical.
« Last Edit: June 23, 2014, 11:50 AM by ikari_01 »

Offline strider1911

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Re: SD2SNES (last revision of the board)
« Reply #16 on: June 24, 2014, 07:33 AM »
What ZeroWing says.

Rev.E1: the version made by KRIKzz up to now.
Rev.E2: actually older than Rev.E1 - I made E2 because the voltage regulator I used became unavailable to me, so I replaced it with parts. KRIKzz can still source the original regulator so this change was irrelevant to him.
Rev.F: A very recent revision. I just sent the CAD data to KRIKzz. This revision accounts for issues that some people with "1CHIP" consoles have been facing. There was an RF-like interference pattern to be seen on screen in some occasions. It is based on Rev.E1.

Feature-wise all revisions are still identical.

Hey Ikari,
I have SD2SNES on its way and a 1CHIP snes. Can you give me more info about this issue so that I'll know what to look for? Thanks.

Offline ikari_01

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Re: SD2SNES (last revision of the board)
« Reply #17 on: June 24, 2014, 10:00 AM »
You are looking for some kind of irregular "wind" pattern in the picture, a bit like bad TV reception (back when it was analog ;))
Like this but FAR less pronounced. It is barely visible, if at all. http://www.avforums.com/attachments/051130_091446-jpg.21520/

Offline keropi

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Re: SD2SNES (last revision of the board)
« Reply #18 on: June 24, 2014, 02:01 PM »
Being a 1CHIP user this interests me , is there a way to mod a SD2SNES from KRIKzz's 2nd batch (bought at 07/05/2012) and fix this interference?
Not that I have noticed anything but if it's easy why not?  ;D

Offline strider1911

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Re: SD2SNES (last revision of the board)
« Reply #19 on: June 24, 2014, 03:24 PM »
You are looking for some kind of irregular "wind" pattern in the picture, a bit like bad TV reception (back when it was analog ;))
Like this but FAR less pronounced. It is barely visible, if at all. http://www.avforums.com/attachments/051130_091446-jpg.21520/

I see, and is this pattern visible when connected using RGB?

borti4938

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Re: SD2SNES (last revision of the board)
« Reply #20 on: June 26, 2014, 09:37 AM »
Being a 1CHIP user this interests me , is there a way to mod a SD2SNES from KRIKzz's 2nd batch (bought at 07/05/2012) and fix this interference?
Not that I have noticed anything but if it's easy why not?  ;D

+1
I'm also interested in that kind of a mod.

If such a mod is not possible:
When will it be sold on retrogate.com?

Offline ikari_01

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Re: SD2SNES (last revision of the board)
« Reply #21 on: June 26, 2014, 05:21 PM »
It's easy to mod but you lose your warranty I guess ;) Just 2 small parts need to be added.
  • 100uF capacitor (preferrably ceramic SMD1206, rated 6.3V or more)
  • 10uH inductor (rated 300mA or more, I used a Murata LQH3C series (LQH32CN100K23))

The following pictures already show the new revision but it should become clear what exactly the modifications are.



The capacitor ("C391") goes to +5V and GND near the +5V pin on the slot, on the IC side of the board. Just scrape off some of the solder mask and solder it on.





The inductor ("L391") goes to the opposite side of the board, into the supply line. You need to cut the +5V trace coming from the same slot pin as before, again scrape off some solder mask on either side, and solder the inductor on.

Offline keropi

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Re: SD2SNES (last revision of the board)
« Reply #22 on: June 27, 2014, 12:04 AM »
thanks ikari_01 for the info! it's easy to do  8)
I do have a question though about the inductor installation, you mention that "You need to cut the +5V trace coming from the same slot pin as before" , do you mean I need to cut a trace or just scrap off the solder mask so I can solder?


edit: also will the following components be OK? I can't source them locally so it's eBay for me...  :-X

http://www.ebay.co.uk/itm/LQH32CN100K33L-Murata-Inductor-1210-Case-10Uh-/130873578598?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item1e78ac5466

http://www.ebay.co.uk/itm/MCCA000574-Multicomp-MLCC-Multi-Layer-Ceramic-Capacitor-1210-X5R-6-3V-100Uf-/140937107143?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item20d08196c7
« Last Edit: June 27, 2014, 12:16 AM by keropi »

Offline ikari_01

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Re: SD2SNES (last revision of the board)
« Reply #23 on: June 27, 2014, 12:21 AM »
Ah yeah that sentence was a bit bogus...  ::)
In the green picture you see L391 which is the inductor you need to place. On your sd2snes you just have a copper trace instead of the inductor. That trace is "interrupted" by the solder pads for the inductor in Rev.F and you need to do the same. Cut the trace there, scrap away on either side of the cut, and put the inductor.
The parts you listed are ok. The capacitor is 1210 instead of 1206 (a bit bigger package) but it doesn't matter much.

Offline keropi

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Re: SD2SNES (last revision of the board)
« Reply #24 on: June 27, 2014, 01:09 AM »
thanks for the clarifications ikari_01 , now I get it  :)

Offline strider1911

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Re: SD2SNES (last revision of the board)
« Reply #25 on: June 27, 2014, 03:26 AM »
wait a sec, which picture corresponds to which capacitor?

borti4938

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Re: SD2SNES (last revision of the board)
« Reply #26 on: June 27, 2014, 08:07 AM »
It's easy to mod but you lose your warranty I guess ;)

Yeah - thanks a lot for that information :D This small mod comes onto my ToDo-list ;D
I've no doubt that I will lose any warranty as my sd2snes is one of 'yours' 8)

wait a sec, which picture corresponds to which capacitor?

First picture: capacitor (silkscreen says 'C391')
Second picture: inductor (silcscreen says 'L391')


Offline nuu

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Re: SD2SNES (last revision of the board)
« Reply #27 on: June 28, 2014, 02:33 AM »
KRIKzz can still source the original regulator so this change was irrelevant to him.
Rev.F: A very recent revision. I just sent the CAD data to KRIKzz. This revision accounts for issues that some people with "1CHIP" consoles have been facing. There was an RF-like interference pattern to be seen on screen in some occasions. It is based on Rev.E1.

Feature-wise all revisions are still identical.
Just curious, what 1CHIP consoles are known to have this problem? There's at least 01, 02 and 03 boards.

Offline keropi

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Re: SD2SNES (last revision of the board)
« Reply #28 on: June 28, 2014, 11:58 AM »
damn, I went to buy the 2 parts I listed above and the seller has an immediate payment requirement - basically it means that outside of UK you need to pay 3.99GBP x2 for shipping and hope you get a refund after you mail him  :-\
If anyone has sourced these parts elsewhere please link them here  :)

borti4938

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