Hacking Hardware Picofly - a HWFLY switch modchip

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looks good, pre-populated boards for sale? also will they have the option for the ffc?
The hwfly cpu flex? I could add it, but the final board is going to be substantially smaller, so might not have the space. Also I figured with the mosfet mounted on this board two with two small wires to the capacitors positive terminal would be easy enough, I personally don't like using the flexs
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looks good, pre-populated boards for sale? also will they have the option for the ffc?
And yeah the boards will be ready to install, preflashed with the latest stable firmware
 
Yup, without Dat0 wires connected to pico it should boot straight to ofw, so the problem lies somewhere else or move to somewhere else (emmc corrupt?).
Just try to desolder everything from pico and hope it will boot normally.
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Yup, that will result in black screen.
If Cmd ripped out it will result purple screen.

For fix : use the thinnest wire you can found (0.01 is prefered), non enameled, Pre tin it, and make a tin blob on the solder tip, use as much flux you like, then start soldering.. only one second solder touch is needed.. you can know its conected if you cannot pull the wire.
First target is to solder the wire on to broken pads.. after that done, solder the other end of wire to good pad.
If the switch can boot, you can continue the mod using alternate dat0 point.
I will recommend on curing the pad after fix it with uv mask, so, no way that will be damage again i think (if i'm incorrect, you can say it without fear ;))
 
Hi everyone, I would like to buy a new tip for modding in future. After struggling with my too big solder tip, I found this one

o1cn01o9cfw21prqf6zkb65-400261838.png

fhVsYu.jpg

Is it suitable for this kind of modding? Or have any better replacement? Im in Asia so shopee or aliexpress is a prefer. Thank you.
 
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Hi everyone, I would like to buy a new tip for modding in future. After struggling with my too big solder tip, I found this one

View attachment 377783
View attachment 377784
Is it suitable for this kind of modding? Or have any better replacement? Im in Asia so shopee or aliexpress is a prefer. Thank you.

Why don't the two of you order some and let us know how they work?
 
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I have been using t12 iron for so long that far away behind modern fancy JBC stuff.
something like this

I have C1 shape for mostly jumper wire or pad repair and often time just bc1.5/bc2 for all other SMD work. When removing or pretinning pads, use bigger one like C4 or blade type tip.

1686715017750.png
 
Last edited by jkyoho,
The hwfly cpu flex? I could add it, but the final board is going to be substantially smaller, so might not have the space. Also I figured with the mosfet mounted on this board two with two small wires to the capacitors positive terminal would be easy enough, I personally don't like using the flexs
Post automatically merged:


And yeah the boards will be ready to install, preflashed with the latest stable firmware
I think the option for the flex would still be a good idea
 
solder paste superb easy than sorder ball
You would find solder ball makes life easier when your bga chip size go larger.
I have both for emmc reball. Not much difference in this case but only takes me extra effort putting back remaining balls when I am cheap and don't wanna waste any single one of them. :rofl:

1686717964406.png
 
I have been using t12 iron for so long that far away behind modern fancy JBC stuff.
something like this

I have C1 shape for mostly jumper wire or pad repair and often time just bc1.5/bc2 for all other SMD work. When removing or pretinning pads, use bigger one like C4 or blade type tip.

View attachment 377790
the C1 tip makes sense such as solder between 2 components, thats also why i want some smaller tip
 
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It seems theres little bit copper in there you might be could soldered it to join the connection. Maybe with a little bit wire in there. After that use the alt point D0 for lite (in right area)
Yup, that will result in black screen.
If Cmd ripped out it will result purple screen.

For fix : use the thinnest wire you can found (0.01 is prefered), non enameled, Pre tin it, and make a tin blob on the solder tip, use as much flux you like, then start soldering.. only one second solder touch is needed.. you can know its conected if you cannot pull the wire.
First target is to solder the wire on to broken pads.. after that done, solder the other end of wire to good pad.
If the switch can boot, you can continue the mod using alternate dat0 point.
Well, I made some progress, I believe I achieved a positive result. What about?

WIN_20230614_00_54_22_Pro.jpg WIN_20230614_01_49_07_Pro.jpgWIN_20230614_01_46_58_Pro.jpg

The multimeter measurements for the post-repaired Dat0 point (diode mode) is 0.655, is that good? I really don't know what the default readings for switch lite are.

I had a spark of hope that soon dissipated, the switch lite didn't turn on. Any tips on how to proceed?
 
Last edited by Mr Skinner,
Solder balls!!!

It makes reballing so incredibly easy. I don't know why people torture themselves with solder paste.

0.3mm solder balls for the emmc.

Why torture? U set the stecil add the paste and heat up till balls appears this takes not even 5 min
.......
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Well, I made some progress, I believe I achieved a positive result. What about?

View attachment 377799 View attachment 377800View attachment 377801

The multimeter measurements for the post-repaired Dat0 point (diode mode) is 0.655, is that good? I really don't know what the default readings for switch lite are.

I had a spark of hope that soon dissipated, the switch lite didn't turn on. Any tips on how to proceed?
I would cut the wire a bit more so u only have the uncoated area on the pads and not almost touching the pad next to it
 
Hello there.
I've installed one RP2040-Zero on a Lite and it have a weird glitching time.
If i let it off for a few hours, the next glitch will take up to 10 seconds, whereas if i turn it on after a few minutes, it will glitch in under 5 seconds.

Is this a normal behavior ?
 
Hello there.
I've installed one RP2040-Zero on a Lite and it have a weird glitching time.
If i let it off for a few hours, the next glitch will take up to 10 seconds, whereas if i turn it on after a few minutes, it will glitch in under 5 seconds.

Is this a normal behavior ?
Yes this is normal. The time can be different per device unit.
 
So I did some research. These resistors on an OLED CMD should show 4.7k and 47 ohms right? Mine showed no value when tested and in diode they show 350 one way, 750 the other. This means they've blown? (I have a black screen when booting).

If so what size are the resistors so I can order new ones and can a faulty CPU flex cable install cause them to blow? I still need to work out what happened.
 

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