Hacking Hardware Picofly - a HWFLY switch modchip

[QuiTim]

That sounds like some really difficult micro soldering job. Is it really necessary? What size of resistor would one use for that, 0402?

It is not necessary but if you can manage to solder it, it would help in an unlikely scenario that G gets detached from pico.
If you want to do it, but you find that 2x2 mosfet is too small to solder to (which it is) you could go with a bigger mosfet (like aon7506, 7518) and use that.

 

[Deleted member 407495]

gone.

 

[Takezo-San]

View attachment 375694

Perfect 10/10 Gif!

 

[QuiTim]

I didn't use the pulldown resistor. I was so close to giving up, I'd rather not do anything that wasn't absolutely needed.
I also only used 1 mosfet. It took all my patience without a microscope.

Just reassembled, still works

No worries, I did 12pcs until now, all single mosfet, without resistor and no problem so far.

 

[Takezo-San]

I didn't use the pulldown resistor. I was so close to giving up, I'd rather not do anything that wasn't absolutely needed.
I also only used 1 mosfet. It took all my patience without a microscope.

Just reassembled, still works

Just to be clear. Pull down resistor is not compulsory but recommended on any general mosfet install in any circuit. Google for more info on why if you want to know more. Also, well done on your install

 

[snaker]

Can anyone who has used IRFHS8342 mosfet tell me if the distance between legs fits a 0201 resistor exactly, so that i order the correct size in order to set it as a pull down resistor with perfect fit between legs.

 

[QuiTim]

Can anyone who has used IRFHS8342 mosfet tell me if the distance between legs fits a 0201 resistor exactly, so that i order the correct size in order to set it as a pull down resistor with perfect fit between legs.

Some overlay on the S pad but it should fit nicely

 

[abal1000x]

.

 

[QuiTim]

rp2040 will give that pulldown resistance when running.

If anyone is building up courage to do a permanent dat0 (like me) I think that using these two products would be a great way to do some practice while also being able to see if the end result was successful:
https://a.aliexpress.com/_mLVHbC8
https://a.aliexpress.com/_mKshhTw

 

[rsilveira1991]

Work fine

 

[Danook28]

Work fine

From where you get this Flex???

 

[raksmey1231]

Hi everyone, can I use Mosfet like this? Is it correct?

 

[abal1000x]

.

 

[Dee87]

Hi everyone, can I use Mosfet like this? Is it correct?

yeah seem correct to me i would make the s line that connects both mosfets togehter shorter though , the resistor seem also fine though i never used them so i can tell u anything about the value

 

[frozenboy]

Hi everyone, I am moding v1 with picofly, I got a bridge in 3.3 cap and the cap next to it (pic above), I am unable to remove the bridge. Will it work normally or I am destroying my V1. This 2 cap is so close and easy to be bridge. I am spend 30 minutes trying to remove it but no hope

 

[gabiy7788]

View attachment 375741
Hi everyone, I am moding v1 with picofly, I got a bridge in 3.3 cap and the cap next to it (pic above), I am unable to remove the bridge. Will it work normally or I am destroying my V1. This 2 cap is so close and easy to be bridge. I am spend 30 minutes trying to remove it but no hope

I make this mistake me too, i succeed only with hot air, i remove first smd and put it after i remove bridge.

 

[frozenboy]

I make this mistake me too, i succeed only with hot air, i remove first smd and put it after i remove bridge.

My hot air is too big for this, I afraid blow all cap around it and end up as a disaster. Next time I will find another spot

Post automatically merged: Jun 3, 2023

I found a pic in this forum about it. I seem it is ok to be bridge. But I not sure, anyone can confirm this?

 

[Dee87]

View attachment 375741
Hi everyone, I am moding v1 with picofly, I got a bridge in 3.3 cap and the cap next to it (pic above), I am unable to remove the bridge. Will it work normally or I am destroying my V1. This 2 cap is so close and easy to be bridge. I am spend 30 minutes trying to remove it but no hope

Not sure but I think the other side is ground from the top cap, u need solderwick and flux to remove it,
Otherwise hot air station and remove the caps then the rest solder

 

[detilmalala]

hi everybody,
perform v1, but it does not start ofw, nor the atm, if I remove the chip it starts fine. Do I have to do something different in v1 to make them work like v2?

 

[Dee87]

My hot air is too big for this, I afraid blow all cap around it and end up as a disaster. Next time I will find another spot

Post automatically merged: Jun 3, 2023

I found a pic in this forum about it. I seem it is ok to be bridge. But I not sure, anyone can confirm this?

What u mean with hot air is to big? Are u talking about a hot air gun? Ifso don't use it.

Well on the picture they both seem to have 3v but on different lines , so remove the solder bridge

Post automatically merged: Jun 3, 2023

hi everybody,
perform v1, but it does not start ofw, nor the atm, if I remove the chip it starts fine. Do I have to do something different in v1 to make them work like v2?

What u mean doesn't start ATM?(I know ur talking about atmosphere)
Does it start hekate?

If it doesn't ofw or hekate then u have a soldering issue.

Its all the same v1/v2