Re: circuit diagrams.
I find it much easier to reverse engineer a circuit which is "wired up" than to do the same for a circuit which uses a printed circuit board (PCB) I'm continually turning the board over to look at components and tracks. Shining a bright light on the back doesn't work very well. Photographing the track side and reversing the image can help.
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Graham. Forum Moderator
Reach for your meter before you reach for your soldering iron.
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