Hacking Hardware Picofly - a HWFLY switch modchip

Mr Skinner · Jun 4, 2023

QuiTim said:
I think you need to replace the "no beep" one

Is this resistor the same one used for the CMD -CLK and DAT0 points on the rp2040?

Relon said:
what's the reading in the diode mode on both sides of CMD resistor?

.387 No beep.

QuiTim · Jun 4, 2023

Mr Skinner said:
Is this resistor the same one used for the CMD -CLK and DAT0 points on the rp2040?

.387 No beep.

No, its not the same. I tracked the trace, that resistor is not connected to ground so it should not beep but it needs to have a specific resistance.
Maybe you can diagnose it as @Relon said in diode mode but I dont know what value is correct in diode mode.
If you can make a reading in resistence mode Ω we could know for sure if it need to be changed

Browbon · Jun 4, 2023

hi everyone, i have successfully installed picofly on my nintendo switch lite. now i want to install it on my v2. i noticed picofly has new firmware with many changes. I would like to know if it will work well with only one mosfet (I noticed one mosfet can cause some errors)

Mr Skinner · Jun 4, 2023

QuiTim said:
No, its not the same. I tracked the trace, that resistor is not connected to ground so it should not beep but it needs to have a specific resistance.
Maybe you can diagnose it as @Relon said in diode mode but I dont know what value is correct in diode mode.
If you can make a reading in resistence mode Ω we could know for sure if it need to be changed

sad...

Anyway, in Ω 20k scale, cmd resistor reads 4.69. This is a good value?
@Relon ?

QuiTim · Jun 4, 2023

Mr Skinner said:
sad...

Anyway, in Ω 20k scale, cmd resistor reads 4.69. This is a good value?
@Relon ?

That is good, the resistor is ok. We need to look elsewhere for the problem.
Did you try it on docking, just to rule out connector?

deeps · Jun 4, 2023

Browbon said:
hi everyone, i have successfully installed picofly on my nintendo switch lite. now i want to install it on my v2. i noticed picofly has new firmware with many changes. I would like to know if it will work well with only one mosfet (I noticed one mosfet can cause some errors)

It works fine. You don't need two mosfets, ever, unless one of them is broken.

Browbon · Jun 4, 2023

deeps said:
It works fine. You don't need two mosfets, ever, unless one of them is broken.

did you have any pictures of single mosfet pattern? the one in the V6.1 installation guide confused me a little bit

abal1000x · Jun 4, 2023

Danook28 said:
1.0 uf 6.3 v ( 0201)

Can you tell me where you got that picture?

jmmc said:
One question for experienced users.

Should we use lead based tin or lead free tin? I read that lead based melts at lower temperatures.

Any advices in which tin should I use?

lead based tin: low temp, easy melt, hard to crack, the fume is very toxic to your body.
lead free tin: high temp, difficult melt, easier to crack, totally safe to your body.

I suggest you use lead free tin. Any lead that got sucked into the bone, difficult to get out.
I still try to find the lead free tin but with lower temp, but still not found. Still used lead tin, with a suck fan + filter. But if i am lazy usually i dont use the fan.

Mr Skinner · Jun 4, 2023

QuiTim said:
That is good, the resistor is ok. We need to look elsewhere for the problem.
Did you try it on docking, just to rule out connector?

I ctually connected the charger directly to the device. But when smoke came out, it was just on the battery.
I also have this CLK island that I rebuilt before powering up. She is not grounded,
I used clear 3d printing resin, and its diode value is 700.

blackpac · Jun 4, 2023

Danook28 said:
If 3v3 capacitor near charge ic chip it is 1uf 6.3V 0402

There are 2 0402 capacitors very close to each other, are they the same value?

Relon · Jun 4, 2023

Mr Skinner said:
Is this resistor the same one used for the CMD -CLK and DAT0 points on the rp2040?

.387 No beep.

in mine it was ~0.3 and ~0.7 on the other side (resistor next to CMD point)

sleeperonair · Jun 4, 2023

Can you please help with the indication?
==* CPU always reaches BCT check (no response to failure, check MOSFET) this is it?
in dialing mode, the processor shows 0 resistance, its okay?

Mr Skinner · Jun 4, 2023

Relon said:
in mine it was ~0.3 and ~0.7 on the other side (resistor next to CMD point)

Same of mine. Thx for response!

abal1000x · Jun 4, 2023

sleeperonair said:
Can you please help with the indication?
==* CPU always reaches BCT check (no response to failure, check MOSFET) this is it?
in dialing mode, the processor shows 0 resistance, its okay?

how you solder the flex?
3-4 should be soldered to use both mosfet

sleeperonair · Jun 4, 2023

abal1000x said:
how you solder the flex?
3-4 should be soldered to use both mosfet

Resistance on sp1 and sp2 0.1 external and 14 ohm internal

abal1000x · Jun 4, 2023

sleeperonair said:
Resistance on sp1 and sp2 0.1 external and 14 ohm internal

I mean the end of the flex there is 6 line. The middle part should be soldered together to use both mosfet.

sleeperonair · Jun 4, 2023

abal1000x said:
I mean the end of the flex there is 6 line. The middle part should be soldered together to use both mosfet.

only 3, i will try together tomorrow. Thank u

Post automatically merged: Jun 4, 2023

abal1000x said:
I mean the end of the flex there is 6 line. The middle part should be soldered together to use both mosfet.

why only 1 is used and it works for them

FreeLander · Jun 4, 2023

sleeperonair said:
Resistance on sp1 and sp2 0.1 external and 14 ohm internal

This is what @abal1000x means

but since both caps show 14ohms, my two cents is that your flex cable is faulty.

deeps · Jun 4, 2023

Browbon said:
did you have any pictures of single mosfet pattern? the one in the V6.1 installation guide confused me a little bit

abal1000x · Jun 4, 2023

sleeperonair said:
only 3, i will try together tomorrow. Thank u

Post automatically merged: Jun 4, 2023

why only 1 is used and it works for them

yes usually only 1 is work.
But theres report people in here whose said sometimes need 2 mosfet.
I myself never meet that cases. 1 mosfet is enough.

But, it could be that the mosfet you use are broke, thats why i suggest using both. If you could check the condition of the mosfet is better. Make sure the mosfet is work, makesure its connected to the cap.

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