Less DIY’ing over the coming days… right…
So I dug into the soldering of the components for the pedal, but couldn’t find any errors in the placement or polarity. Then Nicklas give me the suggestion to look for shorts between the copper rails on the board itself, and low and behold:
That’s a full .5mm of solder right their poking over on the neighbouring rail. And from the +V nonetheless! A quick check with the multimeter confirmed that there was indeed a connection.
Fortunately it was easily fixed:
And with this the circuit now seems ok from a mechanical perspective.
I’ll check the functionality again tomorrow when I don’t risk waking up the whole building…