On off shim


#1

Hi, had a go at setting this up today. Both the on board button and the external button only power the pi whilst pressed, if I let go the power stops. I guess I soldered something wrong?


#2


#3

Would you be able to reflow the joints on the main header and possibly the joints connecting to the button as well also make sure the button is connected correctly


#4

Yep, the solder joints definitely look a bit suspect. You need to make sure to hold your soldering iron long enough that the solder flows right onto the copper pad surrounding the pins; there shouldn’t be any copper visible, ideally.


#5

Thanks, I’ll give it another shot


#6

Had another go. I think solder now covering ok, but still same result. Sorry, I am a complete noob at electronics and this is my first time soldering. No burnt fingers yet though 😉


#7


#8

Any thoughts? Is there something I could be testing on the board with a multi-meter? Just to confirm, it all powers up when I push the switch, but doesn’t stay on when I release it.


#9

Hi

I’d revisit the soldering as some of those joints look a little suspect (dull not shiny). They should all look like the first two at the bottom left of your first image.

Cheers

Paul


#10

Ok cool, I’ll give it another go. I guess best to try and clean the pins up and resolder, rather than try to reuse what is there?

If the solder is dull, does that mean it’s not conductive?


#11

Hi

Dull solder can be a sign of a dry joint which may not conduct.

Cheers

Paul