I know little enough about some topics to be dangerous.
A few days ago I finished my electronic high-speed photo trigger project, and now I tackled fixing the electronic air cleaner for our house. It didn't work for a while, so I ordered some parts, and replaced, mixed, matched, reassembled it back, checked, didn't work, opened it again, tested, corrected, reassembled again, checked, failed again, shook some wires in frustration, and it worked.
IT WORKED!!! :)

Photography tip: When handling a complicated task that you are not familiar with - take pictures of every single step. Composition should include all relevant parts. White balance should be as good as possible so you can find out which color wires were connected where, and retrace your steps correctly. It is much better to take extra, redundant, photos, then finding later you are missing an important angle or detail. Even if everything works at the end, keep your photos as part of the documentation - you never know when will they be helpful again.

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"САМ СВОЈ МАЈСТОР 2"