Hacking Hardware Picofly - a HWFLY switch modchip

Hayato213 · Mar 24, 2023

No_Firmware said:
Guys I need some help !!!

I tried to solder the mosfet but it keeps burning. I‘ve burnt 4 mosfet already.
But my switch lite is totally OK and working normally after I removed RP2040.
What could be the reason ? Has this happen to anyone else ?

Soldering Iron you are using?

szczetyk · Mar 24, 2023

Hi,
Is there a need for two parallel np2016 mosfets (Like there are on hwfly flex for v2 mobos) instead of one IR... Mosfet for mariko?
Or one np2016 will be enough?

Thnx 4 reply.

No_Firmware · Mar 24, 2023

Hayato213 said:
Soldering Iron you are using?

No, not the sordering iorn. It's the mosfet smoking after I pushed the power button, then the mosfet died.

jkyoho · Mar 24, 2023

No_Firmware said:
No, not the sordering iorn. It's the mosfet smoking after I pushed the power button, then the mosfet died.

SHOW your solder work pic

Hayato213 · Mar 24, 2023

No_Firmware said:
No, not the sordering iorn. It's the mosfet smoking after I pushed the power button, then the mosfet died.

Did you soldering drain, source and gate wrong?

No_Firmware · Mar 24, 2023

Maybe it's wrong ?
One more thing is that I don't have 47ohm resistor so I tried 100 and 33 ohm and it went smoking.

Hayato213 · Mar 24, 2023

No_Firmware said:
Maybe it's wrong ?
One more thing is that I don't have 47ohm resistor so I tried 100 and 33 ohm and it went smoking.

Use this as reference.

rehius · Mar 24, 2023

No_Firmware said:
Maybe it's wrong ?
One more thing is that I don't have 47ohm resistor so I tried 100 and 33 ohm and it went smoking.

looks fine, BUT ensure your rp2040-zero is fully connected and working (blue light).

I had such smoke several times when forgot to solder the GND wire

jkyoho · Mar 24, 2023

WHY Kapton tape is under the chip not on top?
Did you put shield back on cpu?

No_Firmware · Mar 24, 2023

THANKS Bro.
It turned out to be that I've flashed wrong firmware, the led went red green then blue.
I reflashed it and now it goes blue.
Really thank u guys.

JackFrostSMT · Mar 24, 2023

BTW just out of curiosity, is the training data stored on non volatile memory? Or will it lose the training if the battery dies?

No_Firmware · Mar 24, 2023

THANKS Bro.
It turned out to be that I've flashed wrong firmware, the led went red green then blue.
I reflashed it and now it goes blue.
Really thank u guys.

Hayato213 said:
Use this as reference.

rehius said:
looks fine, BUT ensure your rp2040-zero is fully connected and working (blue light).

I had such smoke several times when forgot to solder the GND wire

jkyoho said:
WHY Kapton tape is under the chip not on top?
Did you put shield back on cpu?

brecht6 · Mar 24, 2023

brecht6 said:
Yes I know, I meant easier soldering

So what I mean is if it would be possible to put a pcb between emmc and motherboard on a normal switch to expose the necessary connections to glitch the switch. If this is possible it would be a lot safer for beginners to solder because you can solder onto some cheap pcb not the switch itself.

JackFrostSMT · Mar 24, 2023

brecht6 said:
So what I mean is if it would be possible to put a pcb between emmc and motherboard on a normal switch to expose the necessary connections to glitch the switch. If this is possible it would be a lot safer for beginners to solder because you can solder onto some cheap pcb not the switch itself.

you mean on a v2? hwfly did that, connected to the emmc port on the board and you plugged the emmc into the hwfly and it would pass through the rest of the points

brecht6 · Mar 24, 2023

JackFrostSMT said:
you mean on a v2? hwfly did that, connected to the emmc port on the board and you plugged the emmc into the hwfly and it would pass through the rest of the points

Yeah something like that would make it way more user friendly since it reduces the amount of solder points

Arakon · Mar 24, 2023

I seem to have trouble finding a clear installation diagram for the V1 switch. Can anyone give me a decent picture? I mean for the extra wires, not the CPU itself (plenty of pics for that).

brecht6 · Mar 24, 2023

Arakon said:
I seem to have trouble finding a clear installation diagram for the V1 switch. Can anyone give me a decent picture? I mean for the extra wires, not the CPU itself (plenty of pics for that).

Donnie-Burger · Mar 24, 2023

Arakon said:
I seem to have trouble finding a clear installation diagram for the V1 switch. Can anyone give me a decent picture? I mean for the extra wires, not the CPU itself (plenty of pics for that).

Arakon · Mar 24, 2023

Thanks, that's the image I have.. to clarify, on the dat/clk/rst/cmd pins, the top two are the left pad of the double pads, the bottom two are the bottom pad each?

Donnie-Burger · Mar 24, 2023

Arakon said:
Thanks, that's the image I have.. to clarify, on the dat/clk/rst/cmd pins, the top two are the left pad of the double pads, the bottom two are the bottom pad each?

yeah but they all connected to each other so bridging shouldnt be an issue.

Hacking Hardware Picofly - a HWFLY switch modchip

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