Bad soldering

[superidiot123]

Hello everyone,

I'm new into soldering electronics and I've probably broken my RPi Zero W unfortunately. I've checked the voltage on all pins and next to 3.3V I have also 3.3V and I'm not sure if it is correct? This is the pinout for the board.

pinout.PNG (23.97 KiB) Viewed 210 times

My friend has re-soldered the pins but still I have 3.3V next to "blue" pin.

[B.Goode]

welcome to the Raspberry Pi forums.

Hello everyone,

I'm new into soldering electronics and I've probably broken my RPi Zero W unfortunately. I've checked the voltage on all pins and next to 3.3V I have also 3.3V and I'm not sure if it is correct? This is the pinout for the board.
pinout.PNG

My friend has re-soldered the pins but still I have 3.3V next to "blue" pin.

That display is just static information. It doesn't measure anything.

It corresponds with this web version of the same information.

https://pinout.xyz/

Physical pins #1 and #17 on the header should provide 3.3 volts.

[Burngate]

... but still I have 3.3V next to "blue" pin.

Do you mean the pin labeled "GPIO2" on your diagram? If so, that may not actually a problem -it could just be normal.

GPIO2 (and the next one, GPIO3) are used to talk to I2C devices; they have a resistor pulling them up to 3v3, so when they're not doing anything else, that's what a meter would read.

Of course I don't know how bad your soldering actually is, nor how good your friend's is, so I can't declare everything hunky-dory. But I'll keep my fingers crossed.

[neilgl]

And to check the status of a given GPIO (e.g. 21) start a terminal and enter this:

Code: Select all

raspi-gpio get 21

that should show

Code: Select all

GPIO 21: level=0 fsel=0 func=INPUT pull=DOWN

Meaning it is at level 0 i.e. 0 volts, not 3.3 volts.
Good luck with soldering that header onto the pi zero W.