veganism.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
Veganism Social is a welcoming space on the internet for vegans to connect and engage with the broader decentralized social media community.

Administered by:

Server stats:

279
active users

#electronicsrepair

4 posts4 participants1 post today

Stumbled upon my old GoPro WiFi Remote and it won't turn on - no wonder since I've used it last before COVID started - not much to film during lockdowns or war in your country.

Decided to try to save it and it was really easy - just open it by removing four T6 screws and then set the PCB free by removing one PH0 screw. Charge the battery directly with 4.2V from a lab power supply and you're good to go ✅

Oh, man, I guess I got myself into some deep-deep-deep waters with this - absolutely insane amount of information to learn, but curiosity wins again and I love it 🤣.

P.S.: was really happy to find out that initially project website used to be Svod.od.ua - arguably the best programmer on the market originated in Odesa, Ukraine 🇺🇦.

New microscope polarization ring light arrived today.
Until now I used iFixes iL37 and it was a huge improvement over the non-polarized lights. But the picture was pretty poor in terms of color and dynamic range (check photo 1).

Today a new Mechanic LS720+ light arrived and it is way less bright than iFixes, yet more than sufficient.

However it provides a much better picture quality and I can see marking on the chips I simply could not before (photo 2)

I recently set my own record - fixed 11 #RaspberryPi boards in 24 hours 🏆.

And while at it I tried Mechanic M35 Nano Flux.

I really like it and will be using it from now on - it is 4-6 times cheaper than flux I used while it is almost as good + it cleans much better.

No smoke. Decent BGA work.

Two suggestions:
1) use the thinnest needle you have to save it
2) use a needle cap - this flux spills all over the place

#soldering#bga#flux
Continued thread

And while my Pis update - I'll tell you how I saved another Pi 5 today.

It arrived brand new with no shorts, all voltages present.

No missing components.

No broken or burned traces.

Nothing shows up on UART. Customer bought it like that.

So I reflowed the CPU, RAM and RP1 to be on the safe side and right after that I noticed this little prick - a 10K resistor simply got cracked in half 🤯.

Pure luck 🍀.

Hi, #fediverse. Let's try to get #fedihelp with #electronics and #electronicsrepair.

I need to figure the marked component on an Nvidia Jetson Orin Nano carrier board (model P3766) because it has blown up.

If you can - please tell me what marking is there or what that component actually is. It had something like TT written on it - that's all I could see.

Thanks a lot! (boosting is appreciated as well 🙏)

Continued thread

One more. This Pi got so hot it left melt marks on the enclosure 🤯. Eventually CPU died.

It was one with MXL7704-P4 PMIC so that CPU I tried to install earlier worked perfectly fine.

So indeed it seems like different CPU chips are meant to work with different PMICs.

P.S.: It amazes me how these days reballing and replacing a CPU feels like a quick and easy job - something that was unthinkable just a few months ago 🙆‍♂️.

Oh well, today I bought a dead Raspberry Pi 4B 8GB for repair.

I checked 3V3 at the post office and found low resistance - surely a dead PMIC I thought and was too lazy to check the coils around it. Turned out to be a dead CPU.

At first I got a bit upset, but then I remembered that I wanted to try replacing a CPU on a Pi for a while.

So I did. Turns out it's not that big of a deal. Though I did it twice - here's why... —>

So my #Bosch #Intuvia display started to fail to wake up the battery/motor on power on. Its still possible to press the button on the battery to wake it and the motor up but... eh.

Now it got a new smol LiPo. It lasted 25000 km / 1990 hours / 10 years so not bad.

25007 / 1990 hours - thats way too slow? Yes, it counts the time on the charger as well so this is ride time + charge time = total on time (minus the time where I charged the battery directly / not in the bike).