Hacking Hardware Picofly - a HWFLY switch modchip

[Dee87]

Based on the picture, I think your partition is too small. It says you need an additional 12.5 GB of free space.

thats his emuemmc partition he need to drop it in the fat 32 partition

 

[Flasheure]

Someone who would be so kind as to tell me what mosfet I need, Numbering or model to work the peak without processor cables, that is the only thing that is not clear to me since I already saw what the resistors are and the installation and connection points also already I have them, I only need the connection of the processor to the peak

Mosfet IRFHS8342TRPBF

 

[lordmath88]

please, download link firmware for oled?

 

[Hayato213]

Hello, I created a 12 gb emmc partition on a 128 gb micro sd, and when I try to install some files on it, I get that sign, does anyone know what I should do?

View attachment 364343

You should be copying files into that 12GB partition, obviously based on the picture what ever you try to copy is larger than the space in that partition.

 

[Dee87]

please, download link firmware for oled?

top of this thread under important post fw 2.64

Post automatically merged: Apr 11, 2023

You should be copying files into that 12GB partition, obviously based on the picture what ever you try to copy is larger than the space in that partition.

only the files he wants on his emmc, atmosphere belongs on the othe fat32 partition

 

[Raugo]

Anyone with the cpu flex can tell me what value get the multimeter in continuity mode in the solder points? To check if I have solder mine well. I get 0001 and 0015 in the two points of the two mosfets

 

[Phantomas77]

Anyone with the cpu flex can tell me what value get the multimeter in continuity mode in the solder points? To check if I have solder mine well. I get 0001 and 0015 in the two points of the two mosfets

You should be good, one pin is GND and the other around 15-20 Ohm (check it on lowest resistance scale).

 

[KarimPolska]

I need advice, I have tried to solder the 8342 mosfet and I can't, there must be some way but I can't think of a functional way to do it, I thank you in advance

View attachment 364265

check my post here:

https://gbatemp.net/threads/switch-lite-picofly-blackscreen.630751/#post-10124964

 

[Frullone]

Oook, I had everything tested but for some reason I decided to reflow everything and OF COURSE I bridges three small caps (those where you pick ground from).

But honestly, they just look like they're on the same trace and I would really love if I could avoid unbridging those little guys and leave everything as is.
Can anyone confirm me this and/or link some proper diagrams?

I'll attach pictures of my mobo and another one I found online with better resolution, for better trace checking
(They're both taken looking from the top of the Switch towards the bottom)

Since no one was able to reply, I did my own tests and I can now tell you all those three points are ground and I was able to boot safely.
So this is just a reminder that you don't need to panic if you accidentally bridge two or all three of those capacitors to get a gnd connection for the chip

 

[KarimPolska]

How did you guys fit The picofly in the lite? I bent the metal shield a little so it barely fits on the right side of the CPU, but I'm worried the pressure might break off the resistors on the RP2040, is it safe or do I need to dremel a hole in the shield?

This is how I did it. Make sure you cover it with tape, including it's side edges where the pins are, especially on the left side where the speaker is as the metalic shield may touch the pins on the right side as it slides between the Picofly and the speaker.

Post automatically merged: Apr 11, 2023

Alright. I'm about to start on the motherboard. I added pics of what i'm working with for reference.
Few questions:

1) Are the mosfets in my image correct? They say "irh83422tnk". I ordered them because of the "irh8342". I am not familiar with mosfets.
2) If mosfets are correct, should I double them up and follow the "Mariko Dual Mosfet Install Diagram"?
3) My resistors should be good. 47 ohm.
4) Should I be soldering directly to the DAT0, CLK, RST, CMD points on the hac-emmc board OR the ones off the main board? ie: "V1 Patched/V2 Points" diagram

any help is appreciated. i have all the tools and can microsolder pretty well but I am new to the switch.
tia

be sure to check my post here:

https://gbatemp.net/threads/switch-lite-picofly-blackscreen.630751/#post-10125262

 

[Raugo]

You should be good, one pin is GND and the other around 15-20 Ohm (check it on lowest resistance scale).

19,5 Ohm with the lowest resistance. Is a relieve because I had a lot of problem soldering the second mosfet.

Thank you

 

[detilmalala]

Today I made my first erista with pico and cpu flex, I have a 8342 mosfet but it was impossible for me to use it, is there a tutorial using a mosfet or another larger mosfet that is more friendly for soldering?

check my post here:

https://gbatemp.net/threads/switch-lite-picofly-blackscreen.630751/#post-10124964

great, but to weld such a tiny component we need more than photos of a completed installation, if there was a detailed video, for those of us who do not have our technique so refined, it would help us a lot

 

[Dee87]

Today I made my first erista with pico and cpu flex, I have a 8342 mosfet but it was impossible for me to use it, is there a tutorial using a mosfet or another larger mosfet that is more friendly for soldering?

View attachment 364374

great, but to weld such a tiny component we need more than photos of a completed installation, if there was a detailed video, for those of us who do not have our technique so refined, it would help us a lot

View attachment 364389

if u do not have ur "technique" not so refined then microsoldering is nothing for u , then just use flex cables

 

[3CP-andres-N]

good afternoon colleagues, I installed the rp2040 with 2.64 and when I try to enter the original nand after the first logo it stays black and when Ise backup of the nand it gave me this error, put the 470 resistors

 

[lightninjay]

good afternoon colleagues, I installed the rp2040 with 2.64 and when I try to enter the original nand after the first logo it stays black and when Ise backup of the nand it gave me this error, put the 470 resistors

If you used 470, instead of 47 ohms, you need to change those out.

 

[rehius]

good afternoon colleagues, I installed the rp2040 with 2.64 and when I try to enter the original nand after the first logo it stays black and when Ise backup of the nand it gave me this error, put the 470 resistors

eMMC lines interference. try shorter / thicker wires, as I read, more resistance on CMD / D0 lines also helps (47+47 Ohm)

Post automatically merged: Apr 12, 2023

by the way, I have finally updated all of my test units to the 2.64 (from 2.5 so it took a while), and even the really badly soldered ones work perfectly.

tested eMMCs: 2xToshiba/Kioxia, 3xSamsung, 1xSK Hynix, 1xSanDisk
tested NSs: Patched Erista, Unpatched Erista, Mariko, Lite, OLED

(yep, this whole story is pretty expensive for me)

 

[detilmalala]

if u do not have ur "technique" not so refined then microsoldering is nothing for u , then just use flex cables

That would be the simplest, but I want to keep practicing and learning, and it would help me a lot to see someone do it as a reference, if anyone has a link where they solder components as small as the 8342 it would be of great help.

 

[lightninjay]

I finished my PDF guide and sent a PM to @linuxares so it will likely end up in some central location like the AIO thread, but until such a time, here's a public download link to the 21MB PDF file.

Any suggestions to improve it, just let me know, but this seems like a pretty good overview guide to me.

EDIT: replaced link with the updated location hosted here on gbatemp

https://gbatemp.net/download/a-definitive-picofly-install-guide.37968/

 

[Dee87]

eMMC lines interference. try shorter / thicker wires, as I read, more resistance on CMD / D0 lines also helps (47+47 Ohm)

Post automatically merged: Apr 12, 2023

by the way, I have finally updated all of my test units to the 2.64 (from 2.5 so it took a while), and even the really badly soldered ones work perfectly.

tested eMMCs: 2xToshiba/Kioxia, 3xSamsung, 1xSK Hynix, 1xSanDisk
tested NSs: Patched Erista, Unpatched Erista, Mariko, Lite, OLED

(yep, this whole story is pretty expensive for me)

i updated all mine also to 2.64 V2(samsung)/Oled(skynix) no issue

Post automatically merged: Apr 12, 2023

That would be the simplest, but I want to keep practicing and learning, and it would help me a lot to see someone do it as a reference, if anyone has a link where they solder components as small as the 8342 it would be of great help.

View attachment 364395

youtube smd soldering

 

[lightninjay]

That would be the simplest, but I want to keep practicing and learning, and it would help me a lot to see someone do it as a reference, if anyone has a link where they solder components as small as the 8342 it would be of great help.

View attachment 364395

This guy has a pretty clever technique for adapting a blunt soldering iron to doing micro-soldering