I built a module containing two of the simple envelope stripboard layouts.
One works OK.
The other one, I built exactly the same, at the same time and the gate stays open.
There is no schematic on the page so I am a bit lost.
I disconnected the manual switch and the Led, no change, so they are wired fine.
I disconnected the input jack, no change.
Does anyone have a schematic for it?
What could cause it? I’ve been staring at the board for hours, going over the traces. Maybe a faulty diode?
Thanks for the help!